Rough Diamonds, a Practical Guide
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Rough Diamonds, a Practical Guide
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Rough Diamonds: Internal and External Features
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Ruby & Sapphire • A Gemologist's Guide - PRESENTATION EDITION
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RUBY & SAPPHIRE • A COLLECTOR'S GUIDE
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Schitterend Geslepen – Het Kempense diamantverleden onder de loep
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Secrets of the Gem Trade 2nd edition
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Tables of Gemstone Identification - Birgit Günther
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Tables of Gemstone Identification by Ivo QUINTENS (Author), Roger DEDEYNE (Author)
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Terra Garnet - by Vladyslav Y. Yavorskyy
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Terra Gemstones - by Vladyslav Y. Yavorskyy
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The Complete Handbook for Gemstone Weight Estimation
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The Handbook of Gemmology - OUT OF STOCK
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