{"product_id":"gemological-refractometer-1-30-1-81-gemstone-ri-tester","title":"Gemological Refractometer – RI 1.30–1.81","description":"\u003cp\u003eThis professional gemological refractometer is designed for accurate measurement of the refractive index (RI) of gemstones and transparent materials. Refractive index is an important optical property used by gemologists to help identify gemstones and distinguish between materials with similar appearances.\u003c\/p\u003e\n\u003cp\u003eFeaturing a clear optical system with an RI measuring range of approximately 1.30–1.81, the refractometer is suitable for testing a wide variety of gemstones. The durable optical glass testing plate provides a reliable surface for making contact between the gemstone and refractometer fluid.\u003c\/p\u003e\n\u003cp\u003eAvailable with or without a built-in light source, allowing you to select the version that best suits your working environment.\u003c\/p\u003e\n\u003cp\u003eKey Features\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional gemological refractometer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRI measuring range: approx. 1.30–1.81\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAccurate refractive index measurement\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh-quality optical glass testing plate\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClear and easy-to-read optical scale\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFast gemstone testing and identification\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for a wide variety of gemstones\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAvailable with or without built-in light\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eIdeal for professional and educational gemmology\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuitable for laboratories, jewellers and appraisers\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTwo Models Available\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWith Built-In Light\u003c\/strong\u003e\u003cbr\u003eFeatures integrated LED illumination for convenient and uniform viewing of the RI scale without requiring a separate external light source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWithout Built-In Light\u003c\/strong\u003e\u003cbr\u003eDesigned for use with a suitable external monochromatic light source, making it ideal for traditional gemological laboratory setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSpecifications\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProduct Type: Gemological Refractometer\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMeasurement: Refractive Index (RI)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRI Range: Approx. 1.30–1.81\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTesting Plate: Optical glass\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eViewing: Optical eyepiece\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLight Options: With built-in LED \/ Without built-in light\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSample Type: Transparent gemstones and suitable transparent materials\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eContact Liquid: Required for standard gemstone testing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eApplication: Gemstone identification and optical analysis\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUse: Professional \/ Laboratory \/ Educational\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHow to Use:\u003cbr\u003eApply a small amount of suitable refractometer contact liquid to the testing plate and carefully position a suitable polished surface of the gemstone onto the plate. View through the eyepiece and read the RI boundary line on the scale.\u003c\/p\u003e\n\u003cp\u003eFor accurate results, always follow correct gemological testing procedures and use a contact liquid appropriate for the refractometer and material being examined.\u003c\/p\u003e\n\u003cp\u003eWhy Use a Gemological Refractometer?\u003c\/p\u003e\n\u003cp\u003eRefractive index is one of the fundamental optical properties used in gemology. Measuring RI can significantly narrow down the possible identity of an unknown gemstone and provides valuable information when used alongside other gemological tests.\u003c\/p\u003e\n\u003cp\u003eThis refractometer combines a wide 1.30–1.81 measuring range, durable optical testing plate and straightforward operation, making it a practical instrument for professional gemstone examination.\u003c\/p\u003e\n\u003cp\u003eImportant: Refractive index testing is an identification aid and should be interpreted alongside other appropriate gemological tests. Suitable refractometer contact liquid is required for standard testing.\u003c\/p\u003e","brand":"I.DAVID Store","offers":[{"title":"With Light Source","offer_id":45284274438446,"sku":"GMI-7042-LGHT","price":545.45,"currency_code":"EUR","in_stock":true},{"title":"Without Light Source","offer_id":45284274471214,"sku":"GMI-7042","price":475.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0751\/9309\/0350\/files\/REFRACTOMETER-01_c8a0a085-8e69-4c5e-8150-e4718e6317f2.jpg?v=1788782217","url":"https:\/\/idavid.be\/products\/gemological-refractometer-1-30-1-81-gemstone-ri-tester","provider":"I.DAVID","version":"1.0","type":"link"}