News

GIA diamond synthesis

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

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pearl-bead-flp130

New 3-D software for pearls identification

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Diamond testers

Something about diamond testers

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Violet-Argyle

Unique violet diamond

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mystic-topaz1-2

Mystic topaz – natural but treated

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New4_2

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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