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Ruby & Sapphire: A Collector’s Guide...
Richard W. Hughes
Jewel : A Celebration of Earth's Treasures...
Dorling Kindersley
Gemstones: A Jewelry Maker's Guide to Identif...
Judith Crowe
Gemstone buying guide: how to evaluate, identify, ...
Renée Newman
Exotic gems, volume 3 : how to identify, evaluate,...
Renée Newman
Exotic gems, volume 2: how to identify and buy ale...
Renée Newman
Sri Lanka gems...
Vladyslav Y. Yavorskyy
Burma gems...
Vladyslav Y. Yavorskyy
Jade (3rd Edition)...
Ward, Fred
อัญมณีและหินสีนำโชค บำบัดโรค เสริมดวงชะตา (ฉบับปรั...
สุริยศักดิ์ อมตกุล