{"title":"Books","description":"","products":[{"product_id":"jewelry-concepts-and-technology","title":"Jewelry Concepts and Technology","description":"\u003cp\u003eThe most thorough reference book available on traditional and innovative jewelry-making techniques.\u003c\/p\u003e\u003cp\u003eFeatures contemporary works from over 300 jewelers.\u003c\/p\u003e\u003cp\u003e900 photos, 377 illustrations, step-by-step instructions, comprehensive glossary and a detailed index.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003eA must-have book for every goldsmith!\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284031955246,"sku":"BKS-6500-61-1016","price":177.68,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/bk-402.jpg?v=1684093013"},{"product_id":"durete-10-4ieme-edition","title":"Dureté 10 – La Bible du Diamant : Diamants, Taille et Production","description":"\u003cp\u003eDureté 10 – Le Diamant : Plus de 1000 pages en couleur, édition enrichie et hardback\u003c\/p\u003e\n\u003cp\u003eDécouvrez l’ouvrage de référence ultime sur le diamant avec Dureté 10 – Le Diamant, écrit par Eddy Vleeschdrager. Cette quatrième édition enrichie et mise à jour, en format hardback, offre plus de 1000 pages détaillées et illustrées couvrant l’ensemble du pipeline du diamant, de la mine au bijou.\u003c\/p\u003e\n\u003cp\u003eL’ouvrage aborde en profondeur :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGéologie et prospection des gisements de diamants\u003c\/li\u003e\n\u003cli\u003eTechniques de taille traditionnelles et modernes, incluant l’usage du laser et des machines automatiques comme le HRD Octopus\u003c\/li\u003e\n\u003cli\u003eNormes de classement internationales (GIA, IGI, HRD, CIBJO)\u003c\/li\u003e\n\u003cli\u003eDiamants synthétiques et traitements d’amélioration, avec méthodes de détection précises\u003c\/li\u003e\n\u003cli\u003eGlossaire multilingue (français, anglais, néerlandais, allemand) des termes techniques du commerce du diamant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCet ouvrage s’adresse à :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProfessionnels du diamant : diamantaires, bijoutiers, négociants\u003c\/li\u003e\n\u003cli\u003ePassionnés et collectionneurs de diamants\u003c\/li\u003e\n\u003cli\u003eÉtudiants et chercheurs en gemmologie, minéralogie et commerce des pierres précieuses\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAvec plus de 65 000 exemplaires vendus depuis sa première édition, Dureté 10 est souvent qualifié de « bible du diamant ».\u003c\/p\u003e\n\u003cp\u003eAuteur : Eddy Vleeschdrager\u003cbr\u003eFormat : Hardback\u003cbr\u003eÉdition : 4ᵉ Édition\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHardness 10: The Diamond Bible – Over 1000 Pages Full Colour, Hardback Edition\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDiscover the ultimate reference on diamonds with Hardness 10: The Diamond Bible, authored by Eddy Vleeschdrager. This fourth enriched and updated edition, in hardback, spans over 1000 illustrated pages covering the entire diamond pipeline, from mine to jewelry.\u003c\/p\u003e\n\u003cp\u003eThe book covers in detail:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGeology and exploration of diamond deposits\u003c\/li\u003e\n\u003cli\u003eTraditional and modern cutting techniques, including lasers and automated machines like the HRD Octopus\u003c\/li\u003e\n\u003cli\u003eInternational grading standards (GIA, IGI, HRD, CIBJO)\u003c\/li\u003e\n\u003cli\u003eSynthetic diamonds and enhancement treatments, with precise detection methods\u003c\/li\u003e\n\u003cli\u003eMultilingual glossary (French, English, Dutch, German) of technical diamond trade terms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis book is ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiamond professionals: diamond dealers, jewelers, traders\u003c\/li\u003e\n\u003cli\u003eDiamond enthusiasts and collectors\u003c\/li\u003e\n\u003cli\u003eStudents and researchers in gemology, mineralogy, and diamond commerce\u003c\/li\u003e\n\u003cli\u003eWith over 65,000 copies sold since its first edition, Hardness 10 is widely regarded as the “Bible of Diamonds.”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAuthor: Eddy Vleeschdrager\u003cbr\u003eFormat: Hardback\u003cbr\u003eEdition: 4th Edition\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284033265966,"sku":"BKS-6501","price":110.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/durete10_boek1.jpg?v=1764934748"},{"product_id":"tables-of-gemstone-identification-by-ivo-quintens-author-roger-dedeyne-author","title":"Tables of Gemstone Identification by Ivo QUINTENS (Author), Roger DEDEYNE (Author)","description":"\u003cp style=\"font-family: 'Trebuchet MS', Arial, Helvetica; font-size: medium; background-color: #cccccc;\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: medium;\"\u003e\u003cspan lang=\"nl-be\"\u003eThe most actual and updated tables for the determination of gemstones.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-family: 'Trebuchet MS', Arial, Helvetica; font-size: medium; background-color: #cccccc;\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: medium;\"\u003e\u003cspan lang=\"nl-be\"\u003eThis book contains 8 different tables \u003c\/span\u003ethat should lead the user to a fast\u003cspan lang=\"nl-be\"\u003eer\u003c\/span\u003eand correct determination of tran\u003cspan lang=\"nl-be\"\u003es\u003c\/span\u003epar\u003cspan lang=\"nl-be\"\u003ea\u003c\/span\u003ent gems\u003cspan lang=\"nl-be\"\u003etones\u003c\/span\u003e as\u003cspan lang=\"nl-be\"\u003e \u003c\/span\u003ewell as opa\u003cspan lang=\"nl-be\"\u003equ\u003c\/span\u003ee\u003cspan lang=\"nl-be\"\u003eornamental stones\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-family: 'Trebuchet MS', Arial, Helvetica; font-size: medium; background-color: #cccccc;\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: medium;\"\u003e\u003cspan lang=\"nl-be\"\u003eThis book is a must for every gemmologist.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284040147246,"sku":"BKS-6502","price":85.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_34_19.jpg?v=1765126156"},{"product_id":"rough-diamonds-internal-and-external-features","title":"Rough Diamonds: Internal and External Features","description":"\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003eSize: 8 3\/4cm x 5 3\/4cm \u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003ePages: 47 \u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003eThis book contains full color photographs of rough diamonds on all pages. Surface features and rough diamond shapes can be quickly referenced in the field.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284044603694,"sku":"BKS-6504","price":31.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_39_3.jpg?v=1765128866"},{"product_id":"initiation-a-la-gemmologie","title":"Initiation a La Gemmologie","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 14px; line-height: 17px; white-space: pre-wrap;\"\u003eDeuxième édition revue et complétée de ce manuel simple et pratique comportant les bases indispensables de la gemmologie. Pour l'identification des gemmes, une partie est consacrée au diamant et à ses substituts et aux moyens de reconnaissance. Il est complété par un index avec la définition des termes techniques utilisés dans l'ouvrage. Auteur : H. Lagache\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284044636462,"sku":"BKS-6505","price":39.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_39_4.jpg?v=1765126416"},{"product_id":"gemmes","title":"Gemmes","description":"\u003cp\u003e\u003cspan style=\"font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif; font-size: 14px; line-height: 17px; white-space: pre-wrap;\"\u003eL'indispensable de la gemmologie. Cette nouvelle édition, après les trois précédentes, regroupe toutes les caractéristiques des gemmes connues ainsi que leurs imitations, leurs synthèses et leurs traitements. 185 fiches sont ainsi rassemblées dans cet ouvrage de référence.\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284044734766,"sku":"BKS-6506","price":45.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_39_5.jpg?v=1765128825"},{"product_id":"diamond-inclusions","title":"Diamond Inclusions","description":"\u003cp\u003e\u003cspan style=\"color: #333333; font-family: Arial, sans-serif; font-size: 14px; line-height: 22.4px;\"\u003eThis book is devoted entirely to diamond inclusions in all its known natural characteristics. The first one hundred and seventeen pages define external and internal inclusions, describing each variety with numerous full color photomicrographs. What makes this work outstanding is the section in which inclusions are tracked from the rough to the cut and how the integrity of the diamond can be compromised by the depth and position of inclusions that remain. Additionally, an entire section is devoted to the diamond manufacturing process and its relationship to inclusions. In this area inclusions are examined with regards to heat, pressure, directional rotation, and other mechanical influences. Inclusions trapped in diamonds are full of information that in many cases is still to be scientifically interpreted. This book takes us into the fascinating world of micro-inclusions giving us fresh insight in one of nature's most sought after gems.\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284044800302,"sku":"BKS-6554","price":101.24,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_39_6.jpg?v=1765127318"},{"product_id":"rough-diamonds-a-practical-guide-new","title":"Rough Diamonds, a Practical Guide","description":"\u003cp\u003e\u003cspan style=\"color: #373b44; font-family: Lato, sans-serif; font-size: 14px; line-height: 24px; background-color: #fcfbfa;\"\u003eThis new and updated edition of Rough Diamonds, a Practical Guide contains over one hundred additional pages and includes three new chapters and one hundred nineteen new photographs, a total of 289 photos with 274 fact filled pages. It is a 22cm x 29cm hardcover book complete with a ribbon marker, printed on high quality enamel pages. It is the most comprehensive work in the industry and indispensable to those seeking knowledge on rough diamonds. This current work explores the wide range of shapes in rough diamonds, their surface features, internal characteristics, variety of colors, their transparency, size, and value.\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284044833070,"sku":"BKS-6515-WH","price":161.15,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/rough-diamond-expanded-full.jpg?v=1765126886"},{"product_id":"rough-diamonds-a-practical-guide","title":"Rough Diamonds, a Practical Guide","description":"\u003cp\u003e\u003cspan style=\"color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003eRough Diamonds, A Practical Guide\", is a full size hardcover book. It contains 175 fact filled pages with 153 black and white photos and 35 unique color photos. It takes you to the next level of diamond knowledge. The author, Nizam Peters has spent over 5 years in writing and photographing this unique work. \u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e \u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003eThe following subject areas are addressed in this book:\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e1.The rough diamond market \u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e2.Rough Diamond structure shape and orientation.\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e3.Surface features of rough diamonds.\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e4.Internal features of rough diamonds.\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e5.Understanding color in rough diamonds.\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e6.The manufacturing process of rough diamonds.\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003e7.Valuing rough diamonds.\u003c\/p\u003e\u003cp style=\"padding: 0px; margin: 10px 0px; color: #656d79; font-family: Arial, Georgia, 'Times New Roman', serif; font-size: 12px; line-height: 16px;\"\u003eThis book is indespensible to those seeking knowledge on rough diamonds. \u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284044865838,"sku":"BKS-6515-GR","price":92.98,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_39_11.jpg?v=1765128676"},{"product_id":"botswana-s-diamonds-prospecting-to-jewellery","title":"Botswana's Diamonds: Prospecting to Jewellery","description":"\u003cp\u003e\u003cspan style=\"font-family: Lato, Calibri, Arial, sans-serif; font-size: 14px; line-height: 18.2px; text-align: justify; background-color: #f9f9f9;\"\u003eThe book covers all aspects of the diamond industry in Botswana, starting with early prospecting, evaluation, mining, sorting, valuation, polishing, cutting and Botswana Diamond Jewellery. In fact the complete Botswana “Diamond Pipeline” is covered. It is an extremely colourful and positive book, hard backed and stitch bound, which highlights the great benefit that the diamond industry has had on the evolution of Botswana as a country.\u003c\/span\u003e\u003cbr style=\"box-sizing: border-box; padding: 0px; margin: 0px; font-family: Lato, Calibri, Arial, sans-serif; font-size: 14px; line-height: 18.2px; text-align: justify; background-color: #f9f9f9;\"\u003e\u003cbr style=\"box-sizing: border-box; padding: 0px; margin: 0px; font-family: Lato, Calibri, Arial, sans-serif; font-size: 14px; line-height: 18.2px; text-align: justify; background-color: #f9f9f9;\"\u003e\u003cspan style=\"font-family: Lato, Calibri, Arial, sans-serif; font-size: 14px; line-height: 18.2px; text-align: justify; background-color: #f9f9f9;\"\u003eRemarkably, given Botswana’s 40 years history of Diamond Mining, it is the very first time that a book has covered the subject in its entirety and includes information and images on all the main players.\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284046405934,"sku":"BKS-6507","price":95.04,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/Botswana2.png?v=1765128304"},{"product_id":"fancy-color-diamonds-the-pricing-architecture","title":"Fancy Color Diamonds - The Pricing Architecture","description":"\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003eancy Color Diamonds: The Pricing Architecture, by Eden Rachminov\u003c\/div\u003e\n\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003eFancy Color Diamonds: The Pricing Architecture is Eden Rachminov's second book. It was written for the fancy color diamond industry and its wealth of knowledge is now available to all diamond and jewelry professionals, including retailers and the end consumer.\u003c\/div\u003e\n\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003eUtilizing over ten years of data collection and research, this book introduces a new, straightforward system that can be adopted by the industry at large. Mining companies, diamond manufacturers, wholesalers, retailers and even fancy color diamond connoisseurs are welcome to apply Rachminov’s breakthrough methodology.\u003c\/div\u003e\n\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003ePresently, many retailers selling fancy color diamonds employ a relatively narrow professional vocabulary derived from the colorless diamond world. A thorough read of this book and its Appendix will enable the reader to evaluate any fancy color diamond using a much broader scope beyond the basic four Cs and embrace a far more accurate conceptual pricing valuation. It will also provide advanced selling and talking points to enhance the sales process and raise consumer confidence.\u003c\/div\u003e\n\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003eThis book is the first published work to illustrate the commercial aspects of these magnificent gems without compromising the interests of any party throughout the supply chain.\u003c\/div\u003e\n\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003e“The Layer System” presented in this book is a unique approach to illustrate the many impactful commercial characteristics absent from the GIA gemological report. Each attribute is represented as a “layer”, each layer is a chapter in the book and each chapter is accompanied by magnificent images and sketches that visually articulate the text. The impressive Appendix accompanied with the book includes 15 premium charts and over 10,000 coefficient tables that decode the complex fancy color pricing structure and the premiums each characteristic imparts.\u003c\/div\u003e\n\u003cdiv id=\"_mcePaste\" style=\"position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow: hidden;\"\u003eThis book is a must-have-tool for anyone dealing in fancy color diamonds and should find its place among the loupe and diamond report.\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eFancy Color Diamonds: The Pricing Architecture, by Eden Rachminov\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFancy Color Diamonds: The Pricing Architecture is Eden Rachminov's second book. It was written for the fancy color diamond industry and its wealth of knowledge is now available to all diamond and jewelry professionals, including retailers and the end consumer.\u003c\/p\u003e\n\u003cp\u003eUtilizing over ten years of data collection and research, this book introduces a new, straightforward system that can be adopted by the industry at large. Mining companies, diamond manufacturers, wholesalers, retailers and even fancy color diamond connoisseurs are welcome to apply Rachminov’s breakthrough methodology.\u003c\/p\u003e\n\u003cp\u003ePresently, many retailers selling fancy color diamonds employ a relatively narrow professional vocabulary derived from the colorless diamond world. A thorough read of this book and its Appendix will enable the reader to evaluate any fancy color diamond using a much broader scope beyond the basic four Cs and embrace a far more accurate conceptual pricing valuation. It will also provide advanced selling and talking points to enhance the sales process and raise consumer confidence.\u003c\/p\u003e\n\u003cp\u003eThis book is the first published work to illustrate the commercial aspects of these magnificent gems without compromising the interests of any party throughout the supply chain.\u003c\/p\u003e\n\u003cp\u003e“The Layer System” presented in this book is a unique approach to illustrate the many impactful commercial characteristics absent from the GIA gemological report. Each attribute is represented as a “layer”, each layer is a chapter in the book and each chapter is accompanied by magnificent images and sketches that visually articulate the text. The impressive Appendix accompanied with the book includes 15 premium charts and over 10,000 coefficient tables that decode the complex fancy color pricing structure and the premiums each characteristic imparts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis book is a must-have-tool for anyone dealing in fancy color diamonds and should find its place among the loupe and diamond report.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284047225134,"sku":"BKS-6556","price":371.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/files\/ChatGPT_Image_Feb_9_2026_11_43_30_AM.png?v=1770633856"},{"product_id":"a-l-ombre-du-diamant","title":"A L'Ombre du Diamant","description":"\u003cp align=\"right\"\u003eVoici ci-dessous un entretien avec l'auteur:\u003c\/p\u003e\u003cp\u003eIl y a des livres qu’on lit une première fois, puis une deuxième… Des livres que l’on referme en se disant qu’il faut les lire car ils ont le mérite de raconter un autre versant de ce qu’est le commerce des pierres gemmes. C’est le cas avec cet ouvrage « À l’ombre du diamant » qui vous emmènera en Afrique, en Asie ou plus près, en Suisse, sur les pas du diamantaire Jean-Baptiste Mayer qui vous parle avec franchise de son secteur professionnel en particulier.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/legemmologue.files.wordpress.com\/2016\/07\/3.jpg\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003eCar oui, tout n’est pas parfait et tout n’est pas parfaitement propre dans ce domaine particulier. Oui, nombre de négociants en pierres ne peuvent que ce reconnaitre dans certaines des situations et anecdotes décrites. Nul doutes que ce livre ne fera pas plaisir à tout le monde et qu’il ne laissera personne indifférent.\u003c\/p\u003e\u003cp\u003eJ’aurais pu ignorer ce livre et le laisser de coté. Mais il m’avait suffisamment plu pour avoir envie de vous en parler et surtout pour avoir envie de réaliser une interview de son auteur. Je ne vous en dis pas plus. Il vous faudra \u003ca href=\"http:\/\/alombredudiamant.weebly.com\/\"\u003eacheter le livre\u003c\/a\u003e et le lire.\u003c\/p\u003e\u003cp\u003eEn attendant, je vous propose donc de partir à la rencontre de Jean-Baptiste au travers d’un échange autour de son ouvrage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-Pouvez-vous vous présenter à nos lecteurs ?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eJe suis ce que l’on appelle un négociant en diamants et pierres précieuses. Je suis français résidant en Suisse depuis 1999 où je suis aussi basé dans la discrétion toute helvétique qui me convient à merveille.\u003c\/p\u003e\u003cp align=\"center\"\u003e\u003ca href=\"https:\/\/legemmologue.files.wordpress.com\/2016\/07\/1.jpg\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp align=\"center\"\u003eMerelani Hills, Tanzanie \/ Tanzania. Photo : JB Mayer\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e2-Quel est votre parcours professionnel ?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eJ’ai commencé dans le courtage de diamants à Anvers avant de voler de mes propres ailes avec des diplômes de l’IGI et une spécialité dans le diamant brut, ce qui m’a conduit à pratiquer le négoce aussi bien dans des zones hostiles comme la Sierra Leone ou le Liberia que dans des bureaux sécurisés ou dans des hôtels, de Genève à Dubaï, en passant par New York, Hong Kong ou Singapour. Bref, quand même une vie d’errance avec en plus des déviations vers certaines pierres de couleurs comme la Tourmaline qui est devenue ma pierre préférée, tant pour sa diversité de couleurs que pour sa beauté originelle, ou encore pour son pouvoir à faire scintiller les yeux des élégantes qu’il me plait de fréquenter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e3-Pourquoi avoir décidé l’écriture de ce livre qui risquait de faire polémique ?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eParce que personne n’avait jamais osé le faire et que j’ai un gout particulier à sortir des zones de confort pour repousser mes limites personnelles. Des journalistes d’investigations ont écrit des choses instructives, mais leurs points de vue restaient des points de vue extérieurs, aussi objectifs étaient-ils. On peut écrire un bon papier ou réaliser un reportage pertinent sur ce qui se passe au fin fond d’une mine en Afrique ou dans une salle des ventes, mais y aller en solitaire pour y acheter des pierres, c’est tout de suite d’une autre dimension. Les risques ne sont pas les mêmes, la pression non plus, les interlocuteurs se moquant alors bien d’apparaître sous un bon jour. Le but des parties en présence est uniquement d’engendrer du profit, parce que nous ne sommes ni des touristes, ni des amateurs, ni des rêveurs. Nous sommes des professionnels à qui il n’est même pas permis de rêver, faute d’erreur, et de sanction immédiate qui va toucher lourdement le portefeuille, surtout pour un frondeur indépendant comme moi.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e4-Quels sont les retours de la profession à votre égard?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePour l’heure, c’est mitigé. A ma grande surprise, de discrets mais très puissants soutiens me sont déjà parvenu. D’autres attendent de voir comment le vent tourne. Rien d’étonnant là-dedans. Souvenez-vous comment Martin Rapaport a été traité lorsqu’il a publié sa fameuse liste de prix pour la première fois. Aujourd’hui, la profession s’incline à ses pieds. Splendeurs et misères de la nature humaine. Ceci dit, je n’ai pas cette prétention et aucun gout à drainer les foules. En fait, cela m’amuse beaucoup car je m’en moque copieusement. L’avis de ma petite clientèle de connaisseurs m’importe davantage, et eux, ils sont unanimes. Ils ont adoré mon livre. Et le grand public qui commence à le découvrir aussi. Bref, les gens qui me nourrissent me soutiennent avec la sincérité du cœur, alors que demander de plus ?\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e5-J’ai le sentiment que ce métier n’est pas vraiment compréhensible si on est à l’extérieur. Est-ce aussi votre sentiment ?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBien sur. On ne peut pas comprendre ce que l’on ne connaît pas. Je n’aurais pas non plus la prétention de dire que mon livre apporte toutes les lumières compréhensibles aux métiers de la joaillerie mais il y contribue généreusement, même si il y contribue avec le parti pris du marchand que je suis. Je ne suis ni journaliste ni écrivain. Rappelons-le.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6- « Blood diamond », « Diamant noir »…, votre livre comme plusieurs articles de presses, autant de récits qui parle aussi de l’absence d’éthique qui existe dans l’industrie de la joaillerie. Il ne faut pas être complètement naïf sur ce métier. J’essaye néanmoins de me convaincre que l’on peut être parfaitement informé de ce que l’on achète et de la provenance des marchandises. Atteindra-t-on un jour la transparence absolue pour laquelle militent les ONG et certaines institutions reconnues comme le RJC ?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eJe ne crois pas au Père Noel. Les campagnes de communication des uns et des autres qui nous disent à qui mieux-mieux qu’ils lavent plus blanc que blanc, ça finit par m’agacer à la longue car c’est tombé dans le type de communication abusif de l’ère soviétique. Ce n’est plus du marketing ou de la communication de crise. C’est la messe du dimanche à laquelle les fidèles préfèrent assister au bistrot. On a vu à quoi ça a mené. On nie des évidences pour attirer le grand public qui a d’autres aspirations, d’ordre purement économiques, mais aussi et surtout pour répondre favorablement aux professionnels du désordre que sont les ONG. L’élégance, et surtout l’efficacité, seraient peut-être simplement de se taire car certifier haut et fort que l’on contrôle l’incontrôlable relève de l’utopie. La vérité est que tout n’est pas tout blanc, certes, mais la vérité est aussi que tout n’est pas tout noir non plus. Un monde parfait n’existera jamais. Je le répète : c’est de l’utopie. Vous connaissez un monde parfait, vous, un monde où tout le monde il est beau, tout le monde il est gentil ?\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ei apprécié sa franchise. Je connais mon métier et ses zones d’ombres, il ne m’a donc pas choqué. Envisagez-vous d’écrire à nouveau ?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eJe serais tenté de me lancer sur les traces du « Saoudi », le diamant bleu de 50 Carats qui a été volé au Prince Faisal bin Fahd dans l’enceinte même du palais royal à Riyad, par un prétendu jardinier thaïlandais. Le sujet est fascinant et pourrait faire l’objet d’un livre à succès, surtout qu’on suppose maintenant ce diamant –à tort ou à raison- entre les mains d’un puissant de ce monde dont je préfère taire le nom. Par contre, je sais aussi que tous ceux qui ont tenté de s’approcher de ce diamant volé ont tous fini précocement avec du plomb dans le ventre, quand ils ont eu la chance de ne pas être salement torturés. Et ils sont très nombreux, y compris des émissaires du Prince Saoudien. Alors le jeu en vaut-il la chandelle ?\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284047257902,"sku":"BKS-6557","price":28.93,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/file_53_2.jpg?v=1765126078"},{"product_id":"optical-properties-of-diamonds","title":"Optical Properties of Diamonds","description":"\u003cp\u003e\u003cspan style='color: #333333; font-family: \"Helvetica Neue\", Arial, Helvetica, sans-serif; font-size: 13px;'\u003eThis is the most comprehensive handbook on optical properties of diamond ever written. The book does not contain lengthy discussions, instead, it is an accessible collection of data accompanied by short explanations. Much of the data presented in this book is available here for the first time in English. The text contains, in addition to the authors own views, those of other researchers - even where the two interpetations are at odds. Thus all interested students and researchers will benefit from the complete picture offered by this compilation.\u003c\/span\u003e\u003c\/p\u003e\n\nFrom the reviews of the first edition:\n\"The book presents in a systematical manner the experimental and theoretical data on optical properties of diamond accompanied by short explanations and models. … It will help diamond researchers to find a reference or assess the level of knowledge of a particular optical feature. … The main benefit derived from his handbook is a quick access to the most comprehensive information on all aspects of the optical properties of diamond.\" (HD Bruggemann, Optik, Vol. 114 (11), 2003)\n\"This handbook presents for the first time in English a multitude of data on the optics of diamond, which were previously published only in Russian. The author presents his own views alongside the options of other researchers.\" (Materials World, Vol. 9 (9), 2001)","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284047913262,"sku":"BKS-6558","price":306.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/files\/978-3-662-04548-0.webp?v=1765128540"},{"product_id":"secrets-of-the-gem-trade-2nd-edition","title":"Secrets of the Gem Trade 2nd edition","description":"\u003cp\u003ePART I, Chapter 1\u003cbr\u003e\nBecoming A Connoisseur: Essentials\u003cbr\u003e\nImagine a time before the existence of the world we know, long before the invention of artificial colors, aniline dyes or LED lighting. Picture a group of our remote ancestors, a party of Neolithic hunters, clothed in animal hides and armed with spears, picking their way single file, across a shallow mountain stream. One man stoops to drink. Out of the corner of his eye, he catches a tiny flash of color against the stream’s sandy bottom. He pauses, looks around warily, then scoops up the object and holds it up to the sun.\u003cbr\u003e\nNatural alluvial ruby rough from a Tanzanian stream bed. Photo © Richard W. Hughes, courtesy Lotus Gemology.\u003cbr\u003e\nNatural alluvial ruby rough from a Tanzanian stream bed. Photo © Richard W. Hughes, courtesy Lotus Gemology.\u003cbr\u003e\nThe oddly shaped pebble glows with the rich hues of blood and fire. The hunter’s curiosity is sparked, but he looks up, sees his comrades disappearing over the stream’s high bank. He stuffs the stone into a leather pouch tied to his waist, hefts his spear and scrambles to catch up.\u003cbr\u003e\nThat night a chill wind blows across the rugged escarpment. The hunters huddle in the shelter of a rocky cave roasting the day’s kill over a warming campfire. The spitting and crackling of the meat and the flow of its rich red juices jogs the hunter’s memory. He rummages in his pouch, extracts the curious pebble, squints and examines it in the it in the flickering firelight. The man is amazed. The pebble glows like a hot coal yet it remains cool to the touch. What is this magic? The hunter’s heart throbs with excitement. The man’s curiosity turns to awe and perhaps fear.\u003cbr\u003e\nOther men crowd around, comment and reach for this new wonder, but seeing the greed reflected in their eyes, he snatches it back and stuffs it into his pouch. Later, alone, he examines the thing noting its straight edges and curious octagonal shape. Then, seeking to reach the gem’s internal fire, he places it on a large flat rock and strikes it with his hammer stone, but no matter how many times he strikes it, the pebble is unaffected. Next, he saws at it with his knapped flint skinning tool, the hardest object he knows, but the flint makes no mark the pebble’s surface., All he accomplishes is to chip and dull his blade.\u003cbr\u003e\nSunny yellow primordial eye candy! A close up of natural topaz rough plucked from a stream just outside Oro Preto, Minas Gerais, Brazil. Photo © R. W. Wise.\u003cbr\u003e\nSunny yellow primordial eye candy! A close up of natural topaz rough plucked from a stream just outside Oro Preto, Minas Gerais, Brazil. Photo © R. W. Wise.\u003cbr\u003e\nWhat happened next is pure speculation. Perhaps, fearful of the tiny object’s magical properties, he brings it to the shaman, the wisest man in his village, who tells him that the stone is a manifestation of the sprits and appropriates it for himself. Perhaps he trades it to another hunter or, his woman sees and covets it. He wraps it with a thin strip of wet leather, dries the leather in the sun and ties it, the first pendant, triumphantly around her neck.\u003cbr\u003e\nCuriosity…, Wonder…, Desire…! How many similar scenes play out daily in jewelry stores across the world? How often I have observed it working with clients.\u003cbr\u003e\nLike a moth transfixed by the flame, our interest in these curious and beautiful natural creations seems instinctive. The first gem may have been the transparent pebble described above or a sunny yellow crystal caught in the firelight and pried from a cavern wall. Perhaps in the search for flint to knap into tools, a particularly beautiful piece of translucent agate caught a young girl’s fancy. Humanity’s desire to possess and adorn seems instinctive. The first known jewelry, shells perforated to make a necklace, were discovered in a Moroccan cave dating back one hundred thousand years.\u003cbr\u003e\nThe first gems were curiosities appreciated for their beauty and their unusual form. There were no preconceived notions of preciousness. Perhaps one of a handful of crystals had more pronounced color, was more transparent or possessed greater perfection of form.\u003cbr\u003e\nThe standards were instinctive, gut level. Even today, an untrained person shown a box containing several exceptional stones of the same variety will, in the vast majority of cases, instantly select the finest stone. The affinity is immediate. After years of contemplating the beauty of gems, I have determined that the basic principles of connoisseurship can be deduced from a thoughtful contemplation of a single fine gemstone.\u003cbr\u003e\nFor the budding connoisseur, the problem is that in a jewelry store one can see hundreds– at a gem show it is possible to see thousands – of stones. Under such circumstances, the eye is dazzled and the mind goes numb. Without a thorough understanding of principles, the budding but inexperienced aficionado is like the proverbial fatted lamb, ripe and primed for the slaughter.\u003cbr\u003e\nChapter 1\u003cbr\u003e\nPrecious Gems: The History of a Concept\u003cbr\u003e\n“The clumsy modern category of ‘precious‘ stones has little relevance when applied to the ancient world.”  –Jack Ogden1\u003cbr\u003e\nAncient fake! Egyptian engraved faience (glass) bead from the reign of Amenhotep II (1391-1353 B.C.) dyed to resemble lapis lazuli. Faience beads have been found in many fine pieces of ancient jewelry, often side by side with natural gemstones such as turquois and coral. Photo ©1999 Christie’s Images.\u003cbr\u003e\nAncient fake! Egyptian engraved faience (glass) bead from the reign of Amenhotep II (1391-1353 B.C.) dyed to resemble lapis lazuli. Faience beads have been found in many fine pieces of ancient jewelry, often side by side with natural gemstones such as turquois and coral. Photo ©1999 Christie’s Images.\u003cbr\u003e\nPreciousness: Ancient Concept or Modern Prejudice?\u003cbr\u003e\nIn the West the distinction between precious and semi-precious appears to be a relatively recent one. The idea that one material was precious while another was merely semi-precious simply did not exist in ancient times.2 The word semi-precious itself entered the English lexicon only in the 19th century.\u003cbr\u003e\nIn ancient Egypt, for example, the color, not the type of material, appears to have been the primary criterion of value.\u003cbr\u003e\nEgyptian taste in jewelry favored solid bars of vivid color, particularly blue and orange. Opaque and semi-translucent gems such as lapis lazuli, coral, turquoise, carnelian, and sard were highly valued. The masterpieces of ancient jewelry, such as those unearthed in the tomb of the boy king Tutankhamen, were beautifully worked in gold by skilled craftsmen. These treasures included gems such as turquoise and carnelian alternated with stones of faience 3 (a ceramic glass of melted feldspar) dyed to resemble a specific gemstone; in short, a fake! Was this due to a rarity of materials? It was obviously not a question of price. Were the Egyptian craftsmen misled by clever forgeries? Doubtful! The Egyptians simply placed a higher value on visual beauty than on the pedigree of the materials themselves.\u003cbr\u003e\nRoman carnelian cameo circa 2nd Century A.D. One of the most coveted gems of antiquity, today carnelian is consigned to the semi-precious backwaters. Photo © Christie’s Images.\u003cbr\u003e\nRoman carnelian cameo circa 2nd Century A.D. One of the most coveted gems of antiquity, today carnelian is consigned to the semi-precious backwaters. Photo © Christie’s Images.\u003cbr\u003e\nToday with our rigid notions of what is precious and what is not, this seems odd. Would Cartier or Tiffany consider offering gold jewelry set with glass, plastic, or synthetic gems? Yet the glassmakers of ancient Egypt enjoyed royal patronage.4 The point is that the idea of preciousness is fluid. The popularity of gem materials has waxed and waned over the millennia. The truth of this becomes clear when we consider that much of the gem wealth found buried with the pharaohs of Egypt, at Babylon, and in the royal tombs of ancient Sumer is what many today would label as semi-precious.5\u003cbr\u003e\nDescriptions in the Bible also clearly demonstrate that the ideas of the ancients concerning the hierarchy of precious materials differed markedly from our modern view. In Revelations (21: 9-21) an angel describes the heavenly city of Jerusalem as “having the glory of God; and his light was like a stone most precious, even like a jasper stone clear as crystal. . . . And the foundations of the wall of the city were garnished with all manner of precious stones. The first foundation was jasper; the second, sapphire; the third, chalcedony; the fourth, emerald; the fifth, sardonyx; the sixth, sardius; the seventh, crysolite (topaz); the eighth, beryl. . . .” Of the twelve gems named, only emerald and sapphire are commonly referred to as precious today, and although emerald was known to the ancient world, we know that sapphire was almost certainly the ancient name for lapis lazuli.6\u003cbr\u003e\nThe idea of a hierarchy of preciousness may have originated in the ancient East and worked its way slowly westward. In India, the oldest gemstone market, gems were broadly classified as Maharatna and Uparatna in the ancient texts. Of the nine gems of particular importance in those early times; diamond, pearl, ruby, sapphire and emerald were classified as precious. Topaz, jacinth (red zircon), coral and lapis lazuli were of lesser value.7\u003cbr\u003e\nIt is important to keep in mind that beauty was not the sole reason gems were valued in the ancient world. From earliest times gems have been esteemed for their magical qualities, as religious symbols, as talismans, as symbols of rank and status, and for their purported medicinal value.\u003cbr\u003e\nIn the Egypt of the pharaohs, carnelian symbolized blood. In ancient Sumer lapis lazuli represented the heavens. In classical Greece a man supposedly could drink his fill and remain sober if he drank his wine from a cup made of amethyst. To avoid eyestrain, the Roman emperor Nero reputedly viewed gladiatorial contests through an emerald lens.\u003cbr\u003e\nIn ancient China, badges made of gem materials were used to denote rank. Mandarins of the first rank wore red stones such as ruby and red or pink tourmaline; coral and garnet were reserved for bureaucrats of the second rank. Blue stones such as lapis lazuli and aquamarine symbolized the third rank. Mandarins of the fourth rank wore rock crystal. Other white stones indicated the fifth rank. Here again, color, not gemstone type, seems to have been the defining criterion.8\u003cbr\u003e\nGems were also valued as much for their talismanic or medicinal value as for their beauty. These arcane beliefs and associations persist today, but they no longer have any effect on value or the idea of preciousness, particularly as judged in the marketplace.\u003cbr\u003e\nSeal stone engraving: value added\u003cbr\u003e\nThe carving of gems became an important art in ancient times with the introduction of seal stone engraving about 3500 BC by the Babylonians. Gemstones were engraved intaglio with mythical scenes that appeared in relief when the stone was impressed in clay. These engraved gems became the official signatures of kings, nobles, and high-ranking officials of the court. In ancient Mycenae, seal engraving reached a high degree of sophistication by the late Bronze Age. A group of seals recovered from Mycenaean shaft graves at Dendra (on the Greek mainland) shows a mastery of technique as well as a lyric sensibility equaled only by the Greek masters of the classical period and never since.9\u003cbr\u003e\nMinoan\/Mycenaean carnelian seal stone (1450-1300 B.C.) This masterwork of the engraver’s art was often applied to mediocre quality gem material such as this dark opaque carnelian (sardius). Photo © 2001 Christie’s Images.\u003cbr\u003e\nMinoan\/Mycenaean carnelian seal stone (1450-1300 B.C.) This masterwork of the engraver’s art was often applied to mediocre quality gem material such as this dark opaque carnelian (sardius). Photo © 2001 Christie’s Images.\u003cbr\u003e\nThe earliest seals were engraved in relatively soft stones such as serpentine and steatite; these stones could be carved using bronze tools. However, by the twelfth century BC, hard stones such as agate, amethyst and garnet became the materials of choice. Engraving these stones (over six on the Moh’s scale of hardness) required a more sophisticated technique: even iron, the hardest metal then known, was too soft to engrave carnelian agate.\u003cbr\u003e\nCarnelian, the eighth stone of the breastplate of the Tabernacle’s high priest described in the Biblical book of Exodus, was the gem of choice for engravers from the Bronze Age until late Roman times. Fully fifty percent of Greek seals and more than ninety percent of Roman intaglios were carved of carnelian and the darker orange agate called sardius. The 13th century Arab gemologist Al Tifaschi, who did admit of a hierarchy of gems, classed carnelian amongst the “royal” or finest gems (‘al ahdjar al Mulukiyya’).10 Today the stone barely makes the semi-precious list, but carnelian was unquestionably one of the precious stones of antiquity.\u003cbr\u003e\nBy classical times seals were in use throughout the lands bordering the Inland Sea. Experts in this craft enjoyed high status. Some of the best quality gem material is found in Mycenaean gems unearthed at Aidonia. These are carved in the finest translucent layered carnelian. They are the exception: by Roman times, some of the finest masterworks of the engraver’s art were executed in opaque, relatively mundane pieces of dark orange carnelian and sard, demonstrating that the beauty of the material itself was of secondary importance. The real preciousness of the gem lay in the artistry and the quality of execution.11\u003cbr\u003e\nThe Middle Ages: shifting values\u003cbr\u003e\nIn medieval Europe, superstitions centered around the religious, talismanic, and medicinal properties of gemstones were accepted without question. Many of these beliefs had been passed down from ancient times in the writings of the Roman scholar Pliny and repeated in the works of the 7th century bishop Isidore of Seville. The medieval mind, obsessed as it was with questions of sin, death and the torments of Hell, proved fertile ground for the growth, dissemination and acceptance of such beliefs.\u003cbr\u003e\nIn those times, each gem was valued for its ability to protect its wearer from evils both physical and spiritual. “Coral, which for twenty centuries or more was classed among the precious stones,” cured madness and assured wisdom.12  Emerald was considered to protect the wearer against all manner of enchantments. Carnelian drove out evil and protected the wearer from envy. Lapis lazuli was a sure cure for quartan fever. Sapphire also offered protection from envy and was thought to attract divine favor. Chrysoprase protected the thief from hanging.\u003cbr\u003e\nSo universal was the belief in the magical and medicinal qualities of gem materials in the Middle Ages that it is impossible to discuss the value of gemstones in those times without reference to these arcane beliefs. Was the emerald valued for its beauty, or for its supposed value as a treatment for diseases of the eye?\u003cbr\u003e\nDiamond: the invincible\u003cbr\u003e\nDiamond’s fluctuating popularity on the gemstone hit parade further illustrates the point. Diamond was unquestionably the preeminent gemstone in India from as early as the 5th Century BC. India in those far-off times was the only source of diamond and had a flourishing gem-trading industry. The Romans, too, placed diamond at the very pinnacle of preciousness. By early medieval times in the West, however, diamond had fallen to number seventeen on the bestseller list. As late as the 16th century, the celebrated Italian goldsmith Benvenuto Cellini placed diamond third after ruby and emerald, with a price of only one eighth of what a ruby would bring. Writing in 1565, Garcia ab Horto, an early European traveler who described his trip to the gem fields of India, placed diamond at number three, but considered emerald, not ruby, to be the most precious gem of all.\u003cbr\u003e\nNatural bipyramidal diamond crystals. Prior to the 16th century the technology did not exist to either cut or polish a diamond. These natural six-sided crystals were highly valued for their transparency and perfection of form.\u003cbr\u003e\nNatural bipyramidal diamond crystals. Prior to the 16th century the technology did not exist to either cut or polish a diamond. These natural six-sided crystals were highly valued for their transparency and perfection of form.\u003cbr\u003e\nOne prominent scholar, Godeherd Lenzen, maintains that diamond’s early popularity in the western world was based not on its beauty, but on its durability and hardness. The characteristics that make diamond so desirable today — brilliance, dispersion, and transparency — are qualities that occur naturally only in well-formed, transparent diamond crystals. In Roman times, the technology did not exist to fashion or polish diamonds. Transparent well-formed crystals either were retained and sold in India (where they were highly valued) or bought up along the long overland trade route before they reached Rome. Thus, due to the rarity and desirability of fine crystals and the length of the overland trade route between India and Rome, the uncut rough stones that made their way to the ancient Mediterranean were of inferior quality; the attributes of beauty which make the diamond so avidly sought after today were necessarily unknown to the ancient Romans.13 Therefore, Lenzen argues, diamonds could not have been valued for beauty at all, but must have had some other attraction. The Greeks named diamond adamas, a word that means invincible.\u003cbr\u003e\nThis obviously relates to the gem’s legendary hardness, a virtue much admired in imperial times. Was it diamond’s “invincibility” that made it so attractive and valuable to the Romans?\u003cbr\u003e\nMoving from left to right: The bipyramidal natural diamond crystal suggests the basic outline of the table cut, one of the earliest cutting styles. The Peruzzi cut in the next logical step, facets added in an attempt to manipulate light. The modern brilliant cut shows a very subtle change of proportions and fifty-five precisely placed facets.\u003cbr\u003e\nMoving from left to right: The bipyramidal natural diamond crystal suggests the basic outline of the table cut, one of the earliest cutting styles. The Peruzzi cut in the next logical step, facets added in an attempt to manipulate light. The modern brilliant cut shows a very subtle change of proportions and fifty-five precisely placed facets.\u003cbr\u003e\nTo be fair, by the 17th century diamond achieved its current preeminent position in the gem world. The Portuguese subjugation of Goa in west-central India in the 16th century opened up more direct trade routes, increasing the flow of finer diamond rough to the West. The necessary technology for revealing the diamond’s unique beauty — polishing, cutting, and cleaving — was in place in Europe by the middle part of the century.14  Diamond’s preeminence is also a direct result of the development in the late 17th century of the brilliant cut.   The 116 carat blue precursor of the Hope Diamond, brought to Europe by the French adventurer Jean Baptiste Tavernier, was recut in 1683, on the orders of Louis XIV, into the sixty-eight carat stellate brilliant that became known as The French Blue. This important technological advance in the lapidary arts unleashed, for the first time, diamond’s full potential — the astonishing brilliance and fire for which the gem is justly revered.15\u003cbr\u003e\nJack Ogden. 1982.\u003cbr\u003e\nJack Ogden, Jewellery of the Ancient World (New York: Rizzoli International, 1982), p. 90.\u003cbr\u003e\nLois S. Dubin, The History of Beads: From 30,000 BC to the Present (New York: Harry N. Abrams, 1987), p. 42.\u003cbr\u003e\nDubin, History of Beads, p. 43.\u003cbr\u003e\nIbid.\u003cbr\u003e\nAlthough the ancient Egyptians, from whom the Hebrews no doubt derived their notions of gemstones, knew emerald, some distinguished scholars believe that “emerald” (bareketh) was the name given to light green serpentine. George Frederick Kunz, The Curious Lore of Precious Stones (1913; reprint ed., New York: Dover Editions, 1971) pp. 292-301.\u003cbr\u003e\nRadha Krishnamurthy, Gemmology in Ancient India, Indian Journal of History of Science, (27)3 Should follow this order: Title of Journal Volume, no. Issue Number (Year): Page Number(s) 1992, p. 251. Other texts included as many as thirty-two gemstones.\u003cbr\u003e\nGeorge Frederick Kunz, Curious Lore of Precious Stones, (Kessinger Publishing, 2010), p. 256..\u003cbr\u003e\nK. Demakopoulou, ed., The Aidonia Treasure (Athens: National Archaeological Museum, 1996), p. 51.\u003cbr\u003e\nHuda, S.M.A., Arab Roots of Gemology, Ahmad ibn Yusuf Al Tifaschi’s Best Thought on the Best of Stones, (London: Scarecrow Press, 1998), p.24. Al Tifaschi distinguished between al ahdjar al Karima gemstones that were rare and precious and those that were “royal” al Mulukiyya.\u003cbr\u003e\nGreek philosopher Theophrastus, in his treatise on gemstones, written toward the end of the fourth century bc, uses the word perittotera, which Calley and Richards translate as ”precious.” See E.R. Calley and J.C. Richards, Theophrastus on Stones (Columbus, Ohio: Ohio State University Press, 1956), p. 45. Other translators, notably Eichholz, translate perittotera as meaning “unusual.” Professor C.J. Fuqua of Williams College states that Theophrastus uses the term in the sense of more unusual, not more precious. Theophrastus does not use the superlative degree, “most unusual,” in this passage. There is no hierarchy involved with perittotera. (C.J. Fuqua, personal communication, 1999.)\u003cbr\u003e\nKunz, Curious Lore, p. 69.\u003cbr\u003e\nGodeherd Lenzen, The History of Diamond Production and the Diamond Trade (London: Barrie \u0026amp; Jenkins, 1970), pp. 18-19. The Arthashastra of Kautilya, written sometime between the 5th and 6th centuries bc, characterizes a good diamond as one that is “regular in shape, capable of . . . reflecting light brilliantly in all directions.” Some scholars have held that this is a description of a cut diamond, and conclude that diamonds were cut in India as early as the fifth century BC. Lenzen maintains that the diamond described here is a perfectly formed natural crystal, and that such rare crystals were greatly desired in India and never found their way as far as Europe. According to Lenzen, the diamond crystals familiar to the Romans would have been gray, misshapen, barely translucent, and not at all beautiful. See also Kautilya, The Arthashastra, ed. and trans. L.N. Rangarajan (India: Penguin Books, 1992), p. 775. The second century bc writer Damigeron states “the best diamonds are found in India, second best in Arabia and the rest in Cyprus.” Lenzen, a scholar, not a trader, would perhaps not be aware that a stone may be purchased in Arabia but not necessarily remain there if a better price could be obtained in Rome. Damigeron, The Virtues of Stones, trans. Patricia Tahil (Seattle: Ars Obscura, 1989), p. 10.\u003cbr\u003e\nLenzen, History of Diamond Production, p. 105. Although the crude process of faceting — by rubbing one diamond against another to wear each stone down — was known as early as the 14th Century, the technology for cleaving and sawing was not developed until the 17th Century.\u003cbr\u003e\nAnother famous 17th Century gem, the 35.56-carat Wittelsbach Blue. First mentioned in 1667 as part of the collection of Empress Margarita Teresa of Austria was also cut as a stellate brilliant probably either in Venice or Lisbon. vid. Dröschel, J. E., et al., The Wittelsbach Blue, Gems \u0026amp; Gemology, The Gemological Institute of America, Winter 2008, pps.348-352 Evolution of a cutting style: the basic outline of the natural bipyramidal diamond crystal, which evolved into the Perruzzi and thence to the modern brilliant cut.\u003cbr\u003e\nAbout the Author, Richard W. Wise\u003cbr\u003e\nRichard Wise, Gemologist, Author.\u003cbr\u003e\nRichard Wise, Gemologist, Author.\u003cbr\u003e\nRichard W. Wise is a Graduate Gemologist, retired gem dealer, author and lecturer.  His articles on gemstone connoisseurship have appeared in Gems \u0026amp; Gemology, GemGuide, Colored Stone and Jeweler’s Quarterly.  He is a former gemology columnist with National Jeweler and a former contributing editor with Gemkey Magazine and Gem Market News.\u003cbr\u003e\nFrom the pearl farms of Tahiti to Burma’s famous Valley of the Serpents.  From the opal diggings in Queensland to the ancient emerald mines of Colombia, Richard Wise has visited and done business in most of the major gem producing areas in the world.\u003cbr\u003e\nMr. Wise is the author of two books; Secrets Of The Gem Trade, The Connoisseur’s Guide To Precious Gemstones, a critically acclaimed best seller originally published in 2003 and The French Blue, a historical novel and fictionalized biography of the French gem dealer Jean Baptiste Tavernier.\u003cbr\u003e\nsecrets gem trade blue french books\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284048601390,"sku":"BKS-6559","price":132.23,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/front_cover_3-d_art.7.jpg?v=1765128766"},{"product_id":"ruby-sapphire-a-collector-s-guide","title":"RUBY \u0026 SAPPHIRE • A COLLECTOR'S GUIDE","description":"\u003cp class=\"\" data-end=\"80\" data-start=\"0\"\u003e\u003cstrong data-end=\"40\" data-start=\"0\"\u003eRuby \u0026amp; Sapphire: A Collector’s Guide\u003c\/strong\u003e by Richard W. Hughes (2014) - 384 Pages\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"551\" data-start=\"82\"\u003eFew gemstones captivate the imagination like rubies and sapphires, and this book unveils the secrets of these exquisite stones. Drawing from a lifetime of experience, the author travels the world to seek out the finest specimens, offering readers a glimpse into the fascinating locations and people behind these rare gems. Through engaging narratives, Hughes provides insight into the stories of the stones, guiding collectors with an expert’s eye on what to look for.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"823\" data-start=\"553\"\u003eFor many of the pieces featured, actual auction prices are included, helping collectors make informed decisions when buying. Illustrated with over 300 stunning color photographs, this book is both a visual and intellectual treat for gem enthusiasts and collectors alike.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"848\" data-start=\"825\"\u003e \u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284048634158,"sku":"BKS-6508","price":243.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/ruby_sapphire.jpg?v=1765127448"},{"product_id":"ruby-sapphire-a-gemologist-s-guide","title":"Ruby \u0026 Sapphire  •  A Gemologist's Guide - PRESENTATION EDITION","description":"\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eAs the book is now sold out worldwide, we were able to obtain several copies of the PRESENTATION EDITION with a special numbering in each book. Only 100 of such books were made and are therefor higher priced, Buy your copy now !\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDesigned as a companion to Ruby \u0026amp; Sapphire: A Collector's Guide, this massive volume is aimed specifically at working gemologists, appraisers and students.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eBased on Richard W. Hughes' 1997 classic, Ruby \u0026amp; Sapphire, this edition is fully updated. The product of nearly 40 years of firsthand experience and research, it covers every aspect of the subject from A–Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWith over 1000 photos, maps and illustrations and 3500 references,\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eRuby \u0026amp; Sapphire—A Gemologist’s Guide represents the most comprehensive book ever written on a single precious stone.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eby Richard W. Hughes with Wimon Manorotkul and E. Billie Hughes\u003c\/span\u003e\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284048666926,"sku":"BKS-6509","price":795.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/rs-gemologists-guide-book-cover.jpg?v=1765128098"},{"product_id":"book-new-hardness-10-the-diamond-bible","title":"Hardness 10 – The Diamond Bible: Complete Guide to Diamonds, Cutting, and Production Areas","description":"\u003cp\u003eHardness 10: The Diamond Bible – Over 1300 Pages Full Colour, Hardback Edition\u003c\/p\u003e\n\u003cp\u003eDiscover the ultimate reference on diamonds with Hardness 10: The Diamond Bible, authored by Eddy Vleeschdrager. This hardback edition spans over 1300 full-color pages and covers everything from famous stones to industrial applications.\u003c\/p\u003e\n\u003cp\u003eThe extra 1000 pages include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiscovery and polishing of major diamonds, including the Oppenheimer Blue.\u003c\/li\u003e\n\u003cli\u003eNew and emerging diamond production regions, such as Canada, Finland, Norway, and Sweden — countries shaping the future of the diamond industry.\u003c\/li\u003e\n\u003cli\u003eDetailed insights into chemical, optical, and mechanical properties of diamonds.\u003c\/li\u003e\n\u003cli\u003eComprehensive coverage of history, geology, mining, and synthetic diamonds, including CVD and HPHT technologies.\u003c\/li\u003e\n\u003cli\u003eIn-depth information on industrial applications, polishing techniques, sorting, and global trade.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis hardback book is essential for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiamond enthusiasts and collectors\u003c\/li\u003e\n\u003cli\u003eProfessionals in the diamond and jewelry industry\u003c\/li\u003e\n\u003cli\u003eStudents and researchers in geology, mineralogy, and gemology\u003c\/li\u003e\n\u003cli\u003eAnyone interested in the history, science, and future of diamonds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAuthor: Eddy Vleeschdrager\u003cbr\u003eFormat: Hardback\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284057284910,"sku":"BKS-6510","price":110.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/hardness10.jpg?v=1765128700"},{"product_id":"diamonds-an-early-history-of-the-king-of-gems","title":"DIAMONDS: AN EARLY HISTORY OF THE KING OF GEMS","description":"\u003cp\u003eA lavishly illustrated, in-depth early history covering two thousand years of diamond jewelry and commerce, from the Indian mines to European merchants, courts, and workshops\u003c\/p\u003e\n\n\u003cp\u003eThis richly illustrated history of diamonds illuminates myriad facets of the “king of gems,” including a cast of larger-than-life characters such as Alexander the Great, the Mughal emperor Jahangir, and East India Company adventurers. It’s an in-depth study tracing the story of diamonds from their early mining and trade more than two thousand years ago to the 1700s, when Brazil displaced India as the world’s primary diamond supplier.\u003c\/p\u003e\n\n\u003cp\u003eJack Ogden, a historian and gemologist specializing in ancient gems and jewelry, describes the early history of diamond jewelry, the development of diamond cutting, and how diamonds were assessed and valued. The book includes more than one hundred captivating images, from close-up full-color photographs of historic diamond-set jewelry (some previously unpublished), to photomicrographs of individual gems and illustrations of medieval manuscripts, as well as diagrams depicting historical methods of cutting and polishing diamonds.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058038574,"sku":"BKS-6511","price":40.49,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/diamonds_-_an_early_history.jpg?v=1765128484"},{"product_id":"the-microworld-of-diamonds","title":"The MicroWorld of Diamonds","description":"\u003cp\u003eDiamonds are without a doubt the single most important gemstone. Most jewelers depend on them for a major portion of their annual income. Diamonds are also one of nature's most unique and intriguing treasures.\u003c\/p\u003e\n\n\u003cp\u003eThe MicroWorld of Diamonds portrays this most unique gem in an entirely different way—through the microscope. Not only are the micro characteristics of nature's diamonds illustrated in this work, but the industry-wide problematic areas of diamond enhancement, diamond synthesis and diamond simulation are also covered extensively.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058071342,"sku":"BKS-6560","price":78.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/micro_1.jpg?v=1765127701"},{"product_id":"guide-des-pierres-precieuses","title":"Guide des Pierres Précieuses - Walter Schumann","description":"\u003cp\u003eLe Guide des pierres précieuses – Pierres fines et ornementales de Walter Schumann est une référence incontournable en gemmologie, destinée aux amateurs éclairés, collectionneurs, naturalistes et professionnels du monde des pierres précieuses.\u003c\/p\u003e\n\u003cp\u003eCet ouvrage richement illustré décrit et analyse plus de 350 gemmes et variétés, dont les grenats, émeraudes, rubis, opales, perles, ambres, kunzites, agates et des centaines d’autres pierres précieuses, fines et ornementales.\u003cbr\u003eAvec 1 900 photographies couleur, il constitue la plus grande galerie gemmologique de poche jamais publiée.\u003c\/p\u003e\n\u003cp\u003eL’introduction, particulièrement complète, offre une présentation approfondie de la gemmologie, couvrant :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eles propriétés physiques et optiques des gemmes\u003c\/li\u003e\n\u003cli\u003eles gisements et méthodes d’extraction\u003c\/li\u003e\n\u003cli\u003eles traitements et améliorations\u003c\/li\u003e\n\u003cli\u003ela classification minéralogique\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eChaque pierre est étudiée à travers :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eses propriétés optiques (couleur, feu, fluorescence)\u003c\/li\u003e\n\u003cli\u003eses propriétés mécaniques (densité, dureté, clivage)\u003c\/li\u003e\n\u003cli\u003edes photographies détaillées facilitant l’identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDes outils pratiques complètent l’ouvrage : bibliographie, tableaux comparatifs et index, faisant de ce livre un outil fiable pour l’authentification des gemmes et de leurs substituts.\u003c\/p\u003e\n\u003cp\u003eUn livre essentiel pour toute personne souhaitant comprendre, identifier et comparer les pierres précieuses avec rigueur et précision.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTitre : Guide des pierres précieuses – Pierres fines et ornementales\u003c\/li\u003e\n\u003cli\u003eAuteur : Walter Schumann\u003c\/li\u003e\n\u003cli\u003eLangue : Français\u003c\/li\u003e\n\u003cli\u003eType : Relié (Hardcover)\u003c\/li\u003e\n\u003cli\u003ePages : 319\u003c\/li\u003e\n\u003cli\u003eIllustrations : 1 900 photos couleur\u003c\/li\u003e\n\u003cli\u003eContenu : 350 gemmes et variétés répertoriées\u003c\/li\u003e\n\u003cli\u003eDimensions : 13 × 20 × 2,5 cm\u003c\/li\u003e\n\u003cli\u003eSujet : Gemmologie, pierres précieuses, pierres fines et ornementales\u003c\/li\u003e\n\u003cli\u003ePublic : Collectionneurs, gemmologues, bijoutiers, naturalistes, amateurs éclairés\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058104110,"sku":"BKS-6561","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/files\/pierres_precieuses-01.jpg?v=1768948268"},{"product_id":"gemstones-a-complete-color-reference-for-precious-and-semiprecious-stones-of-the-world","title":"Gemstones: A Complete Color Reference for Precious and Semiprecious Stones of the World","description":"\u003cp\u003eThis fascinating work provides a truly stunning visual guide to the beautiful world of gemstones. It brings together a wealth of information in clearly worded text accompanied by a dazzling collection of color photographs showing gems in their natural and cut states.\u003c\/p\u003e\n\n\u003cp\u003eFrom subjects as diverse as identifying and collecting minerals and advanced testing, to ethical sourcing of gems, every aspect of gemstones is covered, and is presented with a wealth of research in easy-to-understand sections, making it a must-have reference work for anyone who wants to delve into the exciting world of gems.\u003c\/p\u003e\n\n\u003cp\u003eThis book guides you through all aspects of the world of gems, exploring the different characteristics and properties of minerals, gems and precious metals.\u003c\/p\u003e\n\n\u003cp\u003e• Combines cutting-edge writing with beautiful full-color photography that captures the beauty of a fascinating array of natural and cut stones.\u003cbr\u003e\n• Presents a wonderfully designed, in-depth directory that identifies each gemstone in turn, exploring every facet of common and rare gemstones and precious metals.\u003cbr\u003e\n• Includes an at-a-glance gallery of gemstones in miniature, plus a failsafe step-by-step identification system.\u003cbr\u003e\n• Reveals interesting facts and surrounding folklore, as well as formation, structure, physical properties, and characteristics of gems, and details of how each might be worked and displayed.\u003c\/p\u003e\n\n\u003cp\u003eSoftcover, full color, 320 pages\u003cbr\u003e\nBook size: 8-1\/4 x 5 inches\u003c\/p\u003e\n\n\u003cp\u003eAbout the Authors: Karen Hurrell is a freelance journalist and bestselling author of many books, including Snapshots in Time and The Unexplained. 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She now owns her own scientific consulting firm.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058136878,"sku":"BKS-6512","price":23.96,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/gemstones_-_complete_reference.jpg?v=1765127081"},{"product_id":"gem-jewelry-pocket-guide","title":"Gem \u0026 Jewelry Pocket Guide","description":"\u003cp\u003eA condensed, pocket-size version of all of Newman's other books. It also includes chapters on notable gem sources, lab documents, buying gems abroad, customs regulations and duties, and choosing jewelers and appraisers.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058202414,"sku":"BKS-6513","price":20.66,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/gem_jewelry_pocket_guide.jpg?v=1765128106"},{"product_id":"exotic-gems-volume-1","title":"Exotic Gems, Volume 1","description":"\u003cp\u003eThis is the first in a series of books that will explore the history, lore, evaluation, geographic sources, and identifying properties of lesser-known gems. Exotic Gems Volume 1 has 288 color photos of mounted and loose tanzanite, ammolite, zultanite, rhodochrosite, sunstone, moonstone, labradorite, spectrolite, andesine, amazonite, bytownite, orthoclase and oligoclase. Some of the pictures are close-up shots that show how to make visual judgments about clarity, transparency, color, cut quality and brilliance. A few pictures show how the gems are cut and many others show creative jewelry designs with these stones. Exotic Gems also provides tips on caring for the gems, selecting an appraiser and on detecting imitations and gem treatments. The healing and metaphysical properties of the gems are also addressed. Written for both consumers and professionals, it’s easy to read, well-organized, and packed with fascinating information and photos. If you’re interested in colored gemstones, you’ll find Exotic Gems to be a valuable resource that will help you discover and buy unusual gem varieties you may never have seen before.\u003c\/p\u003e\n\n\u003cp\u003eExotic Gems, Volume 1: How to Identify \u0026amp; Buy\u003c\/p\u003e\n\n\u003cp\u003eTanzanite, Ammolite, Rhodochrosite, Zultanite\u003c\/p\u003e\n\n\u003cp\u003eSunstone, Moonstone \u0026amp; Other Feldspars\u003c\/p\u003e\n\n\u003cp\u003eby Renée Newman    ISBN 978-0929975-42-9\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058235182,"sku":"BKS-6514-1","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/exotic_gems_vol_1.jpg?v=1765128336"},{"product_id":"exotic-gems-volume-2","title":"Exotic Gems, Volume 2","description":"\u003cp\u003eExotic Gems, Volume 2 is a full-color guide to identifying and evaluating alexandrite, andalusite, chrysoberyl, cat’s-eye, kyanite, sillimanite, common opal, fire opal, dinosaur gembone, tsavorite, rhodolite, spessartine, demantoid, malaya, grossular.and other garnets. This is the second in a series of books that explores the history, lore, properties, qualities and geographic sources of lesser-known gems. Exotic Gems shows you with close-up photos how to make visual judgments about clarity, transparency, color, cut quality and brilliance. It also provides tips on gem care and on detecting imitations and gem treatments. The healing and metaphysical properties of the gems are also addressed. Written for both consumers and professionals, it’s easy to read, well-organized, packed with professional color photos and full of fascinating information. by Renée Newman\u003c\/p\u003e \n\n\u003cp\u003eISBN 978-0929975-45-0\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058267950,"sku":"BKS-6514-2","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/exotic_gems_vol_2.jpg?v=1765128222"},{"product_id":"exotic-gems-volume-3","title":"Exotic Gems, Volume 3","description":"\u003cp\u003eExplore Tourmaline, Fire Agate, Matrix Opal \u0026amp; Blue Chalcedony\u003c\/p\u003e  \n\n\u003cp\u003eExotic Gems, Volume 3 is the third in a series of books that explains with close-up photos the price factors and identifying traits of unusual gems. The stones are shown not only loose but also in jewelry, in the rough and as beads. Fun facts, historical anecdotes, geographic sources, gem treatment information, cutting advice, and tips on gem care are included along with diagrams and tables to aid in identification and evaluation. If you’re interested in matrix opal, fire agate, blue chalcedony, Paraiba tourmaline, rubellite or other tourmalines, Exotic Gems can provide you with jewelry design ideas and in-depth information that will help you be a smart buyer and seller. Written in a succinct and user-friendly style, Exotic Gems: Volume 3 is an ideal reference for jewelers, sales associates, appraisers, gem collectors, gemology students, designers gem dealers and consumers.\u003c\/p\u003e\n\n \n\n\u003cp\u003eby Renée Newman\u003c\/p\u003e \n\n\u003cp\u003eISBN 978-0929975-48-1\u003c\/p\u003e   \n\n\u003cp\u003ePaperback \/ 6\" x 9\"  \/ 136 pages \/ 422 color photos \/\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058497326,"sku":"BKS-6514-3","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/exotic_gems_vol_3.jpg?v=1765129009"},{"product_id":"exotic-gems-volume-4","title":"Exotic Gems, Volume 4","description":"\u003cp\u003eBuying jade is a challenge because its value can vary significantly depending on its quality and treatment status. Moreover, fake jade is prevalent in the marketplace. Exotic Gems, Volume 4 describes with text and photos how to evaluate jade quality, as well as detect imitations and dyed jade. The guide also illustrates advanced detection techniques, and compares price factors and characteristics of jadeite and nephrite jade. Abalone pearls are also covered, with tips on how to identify and evaluate them. This is the fourth in a series of books that explores the history, properties, qualities and geographic sources of exotic gems. If you’re interested in jade or abalone pearls, Exotic Gems, Volume 4 can provide you with the in-depth information you’ll need to be a smart buyer and seller. ,- Contents\u003c\/p\u003e\n\n   \u003cp\u003e1.  Why is Jade so Prized?  9\u003c\/p\u003e\n\n       \u003cp\u003eWhat Makes Jade Special? 9\u003c\/p\u003e\n\n      \n\n   \u003cp\u003e2. What is Jade?  13\u003c\/p\u003e\n\n          \u003cp\u003eIs the Omphacite\/Kosmochlor Jade Issue Relevant? 17\u003c\/p\u003e\n\n       \u003cp\u003eCaring for Jade 17\u003c\/p\u003e\n\n \n\n   \u003cp\u003e3.  Jadeite or Nephrite Jade?  18\u003c\/p\u003e\n\n          \u003cp\u003eJadeite and Nephrite Jade Localities 22\u003c\/p\u003e\n\n       \u003cp\u003eBasic Gemological Tools for Identifying Jade 23\u003c\/p\u003e\n\n       \u003cp\u003eAdvanced Gem Instruments for Identifying Jade 25\u003c\/p\u003e\n\n \n\n   \u003cp\u003e4. Imitation or Real Jade?  30\u003c\/p\u003e\n\n       \u003cp\u003eJade Imitations and Look-a-likes 30\u003c\/p\u003e\n\n       \u003cp\u003eClues Lay People Can Use to Help Detect Fake Jade 41\u003c\/p\u003e\n\n \n\n   \u003cp\u003e5. Treated or Untreated?  43\u003c\/p\u003e\n\n       \u003cp\u003eJade Treatments 43\u003c\/p\u003e\n\n       \u003cp\u003eClues Lay People Can Use to Help Detect Treated Jade 47\u003c\/p\u003e\n\n       \u003cp\u003eAdvanced Tools for Detecting Jade Treatments 50\u003c\/p\u003e\n\n \n\n   \u003cp\u003e6. Jadeite \u0026amp; Nephrite Price Factors  56\u003c\/p\u003e\n\n        \u003cp\u003ePrice Factors for Jadeite Jewelry 56\u003c\/p\u003e\n\n       \u003cp\u003eJadeite Price Factors Explained 57\u003c\/p\u003e\n\n            \u003cp\u003eTransparency 57\u003c\/p\u003e\n\n            \u003cp\u003eColor 59\u003c\/p\u003e\n\n            \u003cp\u003eClarity (Purity) 62\u003c\/p\u003e\n\n            \u003cp\u003eCutting Style \u0026amp; Shape 62\u003c\/p\u003e\n\n            \u003cp\u003eCut Quality (Craftsmanship) 63\u003c\/p\u003e\n\n            \u003cp\u003eCarat Weight \u0026amp; Size 63\u003c\/p\u003e\n\n            \u003cp\u003eSome Jade Jewelry Auction Sales by Bonhams 64\u003c\/p\u003e\n\n            \u003cp\u003eTreatment Status 67\u003c\/p\u003e\n\n            \u003cp\u003eTexture 67\u003c\/p\u003e\n\n        \u003cp\u003eNephrite Price Factors 67\u003c\/p\u003e\n\n  \n\n   \u003cp\u003e7.  Chinese Jade  71\u003c\/p\u003e\n\n       \u003cp\u003eJade from China 71\u003c\/p\u003e\n\n       \u003cp\u003eChinese Jade Trade 73\u003c\/p\u003e\n\n \u003cbr\u003e\n   \u003cp\u003e8.  Burmese Jadeite  78\u003c\/p\u003e\n\n       \u003cp\u003eA Brief History of Burmese Jadeite 84\u003c\/p\u003e\n\n \n\n   \u003cp\u003e9. Guatemalan Jade  85\u003c\/p\u003e\n\n \n\n \u003cp\u003e10. Canadian Jade  91\u003c\/p\u003e\n\n       \u003cp\u003eHow a  Master Carver Carves Canadian Jade 95\u003c\/p\u003e\n\n       \u003cp\u003eA Brief History of Canadian Jade 99\u003c\/p\u003e\n\n \n\n \u003cp\u003e11. USA Jade  100\u003c\/p\u003e\n\n       \u003cp\u003eAlaska Jade 100\u003c\/p\u003e\n\n       \u003cp\u003eCalifornia Jade 101\u003c\/p\u003e\n\n       \u003cp\u003eWyoming Jade 104\u003c\/p\u003e\n\n       \u003cp\u003eHow a Master Carver Carves Wyoming Black Jade 108\u003c\/p\u003e\n\n       \u003cp\u003eA Word from a Master Carver about Wyoming Black Jade 109\u003c\/p\u003e\n\n \n\n \u003cp\u003e12. Jade from Other Sources  110\u003c\/p\u003e\n\n       \u003cp\u003eRussian Jade 110\u003c\/p\u003e\n\n       \u003cp\u003eNew Zealand Jade 112\u003c\/p\u003e\n\n       \u003cp\u003eAustralian Jade 113\u003c\/p\u003e\n\n       \u003cp\u003eSouth Korea Jade 114\u003c\/p\u003e\n\n       \u003cp\u003eSwiss Jade 115\u003c\/p\u003e\n\n       \u003cp\u003eTaiwanese Jade 115\u003c\/p\u003e\n\n       \u003cp\u003eTurkish Jade 116\u003c\/p\u003e\n\n \n\n \u003cp\u003e13. Abalone Pearls  117\u003c\/p\u003e\n\n       \u003cp\u003eHow a Cornucopia Pearl Brought Overflowing Abundance 118\u003c\/p\u003e\n\n       \u003cp\u003eNorth American Abalone Pearls 120\u003c\/p\u003e\n\n       \u003cp\u003eNew Zealand Paua Pearls 122\u003c\/p\u003e\n\n       \u003cp\u003ePaua (Abalone) Mabe Pearl Cultivation 123\u003c\/p\u003e\n\n       \u003cp\u003eIdentifying Characteristics of Abalone Pearls 124\u003c\/p\u003e\n\n       \u003cp\u003eAbalone Pearl Price Factors 127\u003c\/p\u003e\n\n       \u003cp\u003eCaring for Abalone Pearls 130\u003c\/p\u003e\n\n \n\n       \u003cp\u003eBibliography  131\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058530094,"sku":"BKS-6514-4","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/exotic_gems_vol_4.jpg?v=1765126305"},{"product_id":"diamond-handbook-a-practical-guide-to-diamond-evaluation-3rd-edition","title":"Diamond Handbook: A Practical Guide to Diamond Evaluation, 3rd Edition","description":"\u003cp\u003eNEW! The Diamond Handbook: 3rd Edition updates jewelry professionals and serious diamond buyers on new developments in diamond grading, treatments, synthetic diamonds, imitations, branded diamonds and fancy-color diamonds. Using close-up photos, it shows how to make visual judgments about clarity, transparency, brilliance and cut quality. As the Journal of Gemmology stated in its review of the previous edition, the Diamond Handbook “gives the trade reader virtually all the essential information needed to buy and sell diamonds.”\u003c\/p\u003e\n\n     \u003cp\u003eA chapter on how to distinguish transparent and black diamond imitations from real natural diamonds has been added. The chapter on synthetic diamonds has eleven new pages, seven of which are photo pages that help trade members identify HPHT- and CVD-grown diamonds with magnification, fluorescence and crossed Polaroid filters. Photos and information have been updated in the chapters on fancy color diamonds, diamond fluorescence, diamond treatments, recutting diamonds and antique cuts \u0026amp; jewelry. A review in Gems \u0026amp; Gemology described a previous edition as “an entire course on judging diamonds . . . useful to both the jewelry industry and consumers.”\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058562862,"sku":"BKS-6515","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/diamond_handbook.jpg?v=1765127341"},{"product_id":"jewelry-handbook-how-to-select-wear-care-for-jewelry","title":"Jewelry Handbook: How to Select, Wear \u0026 Care for Jewelry","description":"\u003cp\u003eHow to Select Jewelry\u003c\/p\u003e\n\n\u003cp\u003eIf you’d like to look good in your jewelry and be a smart buyer, consult the Jewelry Handbook. It’s like a Jewelry 101 course on the fundamentals of jewelry metals, settings, finishes, necklaces, chains, clasps, bracelets, rings, earrings, brooches, pins, clips, manufacturing methods and jewelry selection and care. Written for professionals and lay people, the Jewelry Handbook outlines the benefits and drawbacks of the various setting styles, mountings, chains, and metals such as gold, silver, platinum, palladium, titanium, stainless steel and tungsten. It also provides information and color photos on gemstones, birthstones, and fineness marks and helps you select versatile, durable jewelry that flatters your features.\u003c\/p\u003e\n\n\u003cp\u003eJewelry Handbook: How to Select, Wear \u0026amp; Care for Jewelry\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058595630,"sku":"BKS-6516","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/jewelry_handbook.jpg?v=1765128687"},{"product_id":"rare-gemstones-how-to-identify-evaluate-and-care-for-unusual-gems","title":"Rare Gemstones: How to Identify, Evaluate and Care for Unusual Gems","description":"\u003cp\u003eRare Gemstones provides concise, interesting and practical details on uncommon gems that are being used by designers to create distinctive jewelry. It not only lists the identification properties of the gems, but tells you where they are found, how they are used, why they are unique, how they are priced, and how to care for them. High quality photos show the different colors and varieties of each gem and give you ideas on how each can be used creatively in jewelry. Written in a succinct, user-friendly style, Rare Gemstones is a companion book to Newman’s Gemstone Buying Guide and an ideal reference for jewelers, sales associates, appraisers, gem collectors, gemology students, gem dealers and consumers.\u003c\/p\u003e\n\n\u003cp\u003eFull Title: Rare Gemstones: How to Identify, Evaluate and Care for Unusual Gems\u003c\/p\u003e   \n\n\u003cp\u003eAuthor: Renée Newman\u003c\/p\u003e\n\n\u003cp\u003ePublisher: International Jewelry Publications\u003c\/p\u003e\n\n\u003cp\u003eISBN-13: 978-0-929975-46-7\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058628398,"sku":"BKS-6517","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/rare_gemstones.jpg?v=1765126191"},{"product_id":"gemstone-buying-guide-how-to-evaluate-identify-select-care-for-colored-gems-third-edition","title":"Gemstone Buying Guide: How to Evaluate, Identify, Select \u0026 Care For Colored Gems, Third Edition","description":"\u003cp\u003eTips on Judging Colored Gems\u003c\/p\u003e\n\n\u003cp\u003eThis updated full-color guide to colored gems provides concise yet comprehensive information on quality evaluation, price comparison, gem identification, cutting styles, treatments, fake stones, optical effects, gem care and geographic sources. Many of the gems are shown mounted in striking designer jewelry. There are 323 new color photos and several new gem species and varieties in this new Third Edition. Also included are interesting historical facts mixed with scientific data and a bit of folklore. Written for consumers and professionals, the Gemstone Buying Guide is a practical, well-illustrated resource for buying, identifying and caring for colored gems. If you want to become a savvy buyer and learn how to select colored gemstones, then you’ll find the Gemstone Buying Guide a fascinating and valuable resource.\u003c\/p\u003e\n\n\u003cp\u003e356 color photos \/ 156 pages \/ paperback\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058661166,"sku":"BKS-6518","price":23.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/gemstone_buying_guide.jpg?v=1765128801"},{"product_id":"gold-platinum-palladium-silver-other-jewelry-metals-how-to-test-select-care-for-them","title":"Gold, Platinum, Palladium, Silver \u0026 Other Jewelry Metals: How to Test, Select \u0026 Care for Them","description":"\u003cp\u003eAbout gold, platinum, palladium, silver, copper, bronze, brass, iron, stainless steel, Damascus steel, titanium, niobium, aluminum, tungsten carbide and cobalt chrome. Gold, Platinum, Palladium, Silver \u0026amp; Other Jewelry Metals explains how to test, buy, sell, and care for jewelry with precious and alternative metals. High-quality color photos show how these metals are creatively used in jewelry. Besides providing an historical perspective and interesting facts about the metals, this book discusses jewelry manufacturing methods, plating and responsible mining \u0026amp; business practices.\u003c\/p\u003e\n\n\u003cp\u003eIt also discusses:\u003c\/p\u003e\n\n\u003cp\u003e♦ How to read the stamps on jewelry mountings\u003c\/p\u003e\n\n\u003cp\u003e♦ How to identify jewelry metals\u003c\/p\u003e\n\n\u003cp\u003e♦ How to determine the gold content in jewelry\u003c\/p\u003e\n\n\u003cp\u003e♦ How to prevent and remove silver tarnish\u003c\/p\u003e\n\n\u003cp\u003e♦ How and where to sell your unwanted jewelry\u003c\/p\u003e\n\n\u003cp\u003e♦ How to spot a fair consignment contract\u003c\/p\u003e\n\n\u003cp\u003e♦ How to select refiners and prepare jewelry metal for them\u003c\/p\u003e\n\n\u003cp\u003e♦ How to clean metal jewelry\u003c\/p\u003e  \n\n \n\n\u003cp\u003eAuthor: Renée Newman\u003c\/p\u003e\n\n\u003cp\u003ePublisher: International Jewelry Publications\u003c\/p\u003e\n\n\u003cp\u003eISBN-13: 978-0-929975-47-4\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058693934,"sku":"BKS-6519","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/gold_platitinum_palladium_silver_other_jewelry_metals.jpg?v=1765128141"},{"product_id":"pearl-buying-guide","title":"Pearl Buying Guide","description":"\u003cp\u003ePEARLS OF WISDOM on how to evaluate pearls, spot fakes and detect dyed pearls. Included in this full-color guide are tips on pearl care, clasps, and creative ways to wear pearls. All types of pearls are discussed–Akoya, Tahitian, South Sea, Sea of Cortez, freshwater, abalone, scallop, conch, melo, quahog, giant clam, mabe, blister, keshi, natural, imitation, cultured.\u003c\/p\u003e\n\n     \u003cp\u003eAlthough technical data is included to aid gemologists in detecting treatments and identifying pearls, the easy reading style and the 364 photos make this a customer-friendly book for both consumers and professionals, If you’re looking for an easy-to-read, illustrated and affordable pearl handbook that will help you select flattering pearls and spot fakes, the Pearl Buying Guide 6th Edition is the best choice available.\u003c\/p\u003e\n\n\u003cp\u003eby Renée Newman\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058726702,"sku":"BKS-6520","price":23.14,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/pearl_buying_guide.jpg?v=1765129157"},{"product_id":"fancy-color-diamonds","title":"Fancy Color Diamonds","description":"\u003cp\u003eThe Fancy Color Diamond Book took two and a half years to research, write, edit, design and produce. Chronicled with page upon page of stunning photographs and illustrations, it is the ultimate combination of a practical manual and a luxurious coffee-table book. The Fancy Color Diamond Book serves as a definitive source on fancy color diamonds, whether you are a retail jeweler, designer, an admirer of diamonds as accessories, as an investment or as a collectors’ piece. The Fancy Color Diamond Book contains substantial information about the range of fancy color diamonds, as well as, issues of grading, clarity and the challenges of cutting fancy color diamonds.\u003cbr\u003e\nWith each copy of The Fancy Color Diamond Book sold, a portion of the proceeds go directly to the Save the Children organization.\u003c\/p\u003e\n\n\u003cp\u003e231 Pages • color ill. • Format : 24 x 32 cm.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058759470,"sku":"BKS-6562","price":297.52,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/fancy_colour.jpg?v=1765127608"},{"product_id":"gems-the-world-in-your-hands","title":"Gems: The World in Your Hands","description":"\u003cp\u003eCompact and easy-to-use, Nature Guide: Gems provides a thorough introduction and detailed, clearly illustrated profiles of hundreds of examples of precious metals, cut stones, and organics. Packed with stunning photography and key information provided by expert contributors, Nature Guide: Gems is carefully structured, with catalog entries organized into easily understood groups that the newcomer will have no difficulty in navigating and the more experienced reader will appreciate.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058792238,"sku":"BKS-6521","price":23.97,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/gems.jpg?v=1765128188"},{"product_id":"the-diamond-compendium","title":"The Diamond Compendium","description":"\u003cp\u003eSought after, fought over, hoarded, hidden and stolen; diamonds remain one of mankind's greatest obsessions. Diamond represents the most concentrated form of wealth on the planet and the hardest known natural substance. Covering everything from the origin of diamonds and their properties, through mining, the four Cs of grading and marketing, to modern high-tech treatments, fancy coloured diamonds and synthetics, The Diamond Compendium presents the body of diamond knowledge in a simple and understandable way. Written by a diamond expert this book is based on thousands of hours of research with specialists worldwide. Whether you are using this book to learn the facts about purchasing diamonds, understand the trade, prepare for formal examinations or simply satisfy your curiosity, The Diamond Compendium is the most thorough, absorbing and comprehensive book on the market.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284058890542,"sku":"BKS-6563","price":177.68,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/the_diamond_compendium.jpg?v=1765127487"},{"product_id":"the-handbook-of-gemmology","title":"The Handbook of Gemmology","description":"\u003cp\u003e\u003ca href=\"https:\/\/idavid.be\/collections\/books\/products\/handbook-of-gemmology-5th-edition-3-volume-set\" title=\"5th edition\"\u003e\u003cem\u003e\u003cstrong\u003eNote: The printed 4th Edition is currently not in stock.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/idavid.be\/collections\/books\/products\/handbook-of-gemmology-5th-edition-3-volume-set\" title=\"5th edition\"\u003e\u003cem\u003e\u003cstrong\u003eYou can still purchase the new and improved 5th Anniversary Edition\u003c\/strong\u003e\u003c\/em\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eIntroducing the 5th Anniversary Edition of The Handbook of Gemmology\u003cbr\u003eWe are thrilled to announce that, in addition to the new 4th Edition digital download, a stunning two-volume 5th Anniversary printed edition was released on May 15, 2018.\u003c\/p\u003e\n\u003cp\u003eFor years, the most asked question has been: “When will we offer a printed version?”\u003cbr\u003eThis edition was created because too many essential gemmological textbooks were becoming outdated or going out of print. In a fast-evolving industry, outdated references are unacceptable.\u003c\/p\u003e\n\u003cp\u003eGoing digital allowed us to continually update and expand content while staying the most up-to-date gemmological reference on the market. But we also knew many readers wanted a printed edition. That’s why we now release Anniversary printed editions every five years — giving customers the best of both worlds.\u003c\/p\u003e\n\u003cp\u003e What’s New in the 5th Anniversary Edition?\u003c\/p\u003e\n\u003cp\u003eThis edition has grown substantially since the 1st edition, now totaling 1,342 pages — 688 more pages than the original. The size required the printed version to be released in two volumes.\u003c\/p\u003e\n\u003cp\u003eDigital Enhancements\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe digital edition is now available online, giving you the choice to:\u003c\/li\u003e\n\u003cli\u003eDownload device-specific files (e-book format)\u003c\/li\u003e\n\u003cli\u003eView online via login, without using storage space\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis edition features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompletely redesigned layout\u003c\/li\u003e\n\u003cli\u003eHundreds of new photographs\u003c\/li\u003e\n\u003cli\u003eNew sections on gem mining in Africa and Myanmar\u003c\/li\u003e\n\u003cli\u003eUpdated pricing comparisons for major gemstones\u003c\/li\u003e\n\u003cli\u003eNew approach to gemstone identification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eExceptional Photography\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe book features photography from renowned gem\/mineral photographers including:\u003cbr\u003eTino Hammid, Jeff Scovil, Conny Forsberg, John Dyer, David Dyer, Lydia Dyer, Priscilla Dyer, Ozzie Campos, Dmitry Stolyarevich, Arjuna Irsutti, and Sergey Pryanechnikov.\u003c\/li\u003e\n\u003cli\u003eTotal visual content includes:\u003c\/li\u003e\n\u003cli\u003e1,428 photographs\u003c\/li\u003e\n\u003cli\u003e191 diagrams and illustrations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eComprehensive Gemmology Coverage\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBoth printed and digital editions include full coverage of:\u003c\/li\u003e\n\u003cli\u003eGemstone chemistry\u003c\/li\u003e\n\u003cli\u003ePhysical and optical properties\u003c\/li\u003e\n\u003cli\u003eCrystallography and light absorption\u003c\/li\u003e\n\u003cli\u003eSpectroscope \u0026amp; polarized light testing\u003c\/li\u003e\n\u003cli\u003ePolariscope, dichroscope, color filters\u003c\/li\u003e\n\u003cli\u003eSpecific gravity, luminescence, magnification\u003c\/li\u003e\n\u003cli\u003eThermal conductivity testing\u003c\/li\u003e\n\u003cli\u003eIdentification of imitations, assembled, lab-created gems, and enhancements\u003c\/li\u003e\n\u003cli\u003eMining, gem cutting, grading, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGem Identification \u0026amp; GemFacts\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes 12 chapters focused on identifying gemstones by color and transparency, plus:\u003c\/li\u003e\n\u003cli\u003eAdvanced gem testing techniques\u003c\/li\u003e\n\u003cli\u003e17 common gemstone species and varieties\u003c\/li\u003e\n\u003cli\u003e134-page ‘Reflections’ photo section featuring award-winning gem cutter John Dyer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat Readers Are Saying:\u003cbr\u003eSuzann wrote: “This is the greatest book on gemology I have ever seen. It has it all. Don’t need any of my other books. It is a truly beautiful book.”\u003c\/p\u003e\n\u003cp\u003eIf you are serious about gems and gemmology, this book belongs in your reference library.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284059185454,"sku":"BKS-6522","price":500.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/handbook_of_gemmology2.png?v=1765127213"},{"product_id":"coloured-diamonds-2nd-hand","title":"Coloured Diamonds (2nd Hand)","description":"\u003cp\u003eHidden within the geological formations of our planet are some of the most unique and beautiful expressions of nature: fancy coloured diamonds. For centuries, these mysterious, exotic, and rare gemstones have been admired by connoisseurs, analyzed by gemologists, and coveted by collectors. Collecting and Classifying Coloured Diamonds, provides a detailed and handsomely illustrated account of these unusual gemstones.\u003c\/p\u003e\n\n\n\u003cp\u003eUsing the Aurora Collection of 260 fancy colour diamonds as its foundation, Collecting and Classifying Coloured Diamonds, explores the gamut of colours displayed by diamonds in nature and, in a format for both the layperson and the expert, investigates how diamond colours are perceived, measured, and classified. The Aurora Collection, considered one of the finest in the world, has been on exhibit at the American Museum of Natural History in New York since 1989.\u003c\/p\u003e\n\n\n\n\n\u003cp\u003eCollecting and Classifying Coloured Diamonds was created to be a joy to look at, a pleasure to read, and a detailed reference for anyone interested in learning about nature's diverse expressions of colours in diamond. 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If you want only one book on gemstones in your library, this would be the one!\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284071735598,"sku":"BKS-6532","price":40.49,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/gemstones_of_the_world_-_walter_schumann.jpg?v=1765127032"},{"product_id":"diamond-the-ultimate-gemstone","title":"Diamond : The Ultimate Gemstone","description":"\u003cp\u003eDiamond is associated with ideals of purity, love, nobility, and wealth and with curses, corruption, and poverty. Its unique properties are studied by physicists and geologists, while its value, brilliance, and cultural importance make it a target of historians, investors, lovers, and thieves. 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This is the world he wants to share with everyone who has not been able to visit these places themselves or one day plan to go.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284071899438,"sku":"BKS-6534","price":460.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/products\/garnet_resized1.jpg?v=1765127829"},{"product_id":"terra-gemstones-by-vladyslav-y-yavorskyy","title":"Terra Connoisseur – Gemstones: Masterpieces of Nature, Faceted and Rough","description":"\u003cp\u003eTerra Connoisseur – A Sensational Experience Celebrating the World’s Most Beautiful Gems\u003c\/p\u003e\n\u003cp\u003eFrom the author of the groundbreaking Terra Spinel (2010) and Terra Garnet (2014), Terra Connoisseur is a stunning tribute to the beauty, durability, and value of natural gemstones. This hardcover edition presents over 2000 original gem photographs, including faceted and rough stones, more than 50 mineral specimens, jewelry, and historical artifacts.\u003c\/p\u003e\n\u003cp\u003eDuring production, the editorial team and expert gem hunters undertook numerous gem mining expeditions to capture up-to-date images, collect fresh specimens, and provide a true insider view of the gemstone world.\u003c\/p\u003e\n\u003cp\u003eHighlights include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTechnical and social aspects of gemology, presented in engaging, original chapters\u003c\/li\u003e\n\u003cli\u003eUnique photo sequences showing gems in rough, preform, and faceted stages by a master cutter\u003c\/li\u003e\n\u003cli\u003eOver 260 authentic photos of gem mining, breathtaking landscapes, macro shots, maps, drawings, and artistic compositions\u003c\/li\u003e\n\u003cli\u003eDetailed coverage of each gemstone variety, focusing on natural, untreated, rare, and beautifully cut gems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTerra Connoisseur educates readers through its captivating photography and immersive writing. Professional gem hunters and writers share first-hand accounts, making the book vibrant, versatile, and hugely entertaining.\u003c\/p\u003e\n\u003cp\u003eThis book is perfect for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGemstone connoisseurs and collectors\u003c\/li\u003e\n\u003cli\u003eJewelry professionals and designers\u003c\/li\u003e\n\u003cli\u003eEnthusiasts eager to explore natural gems\u003c\/li\u003e\n\u003cli\u003eAnyone seeking to appreciate the beauty, history, and investment value of gems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether for learning, collecting, or simply enjoying the artistry of natural gemstones, Terra Connoisseur is an essential reference for every gem lover.\u003c\/p\u003e\n\u003cp\u003eFormat: Hardcover\u003cbr\u003ePages: 234\u003cbr\u003eAuthor: Vladyslav Yavorskyy\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"Default Title","offer_id":45284071932206,"sku":"BKS-6535","price":162.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/files\/71bB5k3DoZL._SL1500.jpg?v=1770072201"}],"url":"https:\/\/idavid.be\/collections\/books.oembed?page=6","provider":"I.DAVID","version":"1.0","type":"link"}