News

Ongoing research program on synthetic diamonds - CVD growth facility in GIA

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New 3-D software for pearls identification

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Something about diamond testers

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Unique violet diamond

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Mystic topaz – natural but treated

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Smoke treated Wollo opal from Ethiopia

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New synthetic material on the gems market

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Second expanded and rewritten edition of the book „Secrets of the Gem Trade, The Connoisseur’s Guide to Precious Gemstones“ by Richard W. Wise

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