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Tsarstone collectors guide

gemstone identification

11. Zenhokyo
Leading gemmological educational institution in Japan has been providing professional education in the field for the past 30 years. Zenhokyo Laboratory is equipped with the most professional and advanced testing devices and systems, including inductive
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12. Hong Kong Gems Laboratory
Established in 1987, Hong Kong Gems Laboratory is well equipped and recognized by gemologists and industry professionals. Full-service lab offers FTIR spectrophotometerservice, which provides evidence for jadeite jade and diamond, corundum, emerald and ot
HTML, 65 Kb, 2009-03-15 02:25:21
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