The GIA Diamond Origin Report: Traceability Based on Science

Consumers now, more than ever, have a heightened awareness of sustainably and ethically sourced products. The GIA Diamond Origin Report uses scientific evaluation to provide confirmation of a diamond’s geographic origin.
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Latest Laboratory Promotions

View details about the latest diamond grading promotions.
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Diamond Market Recovery, Auction Results

World’s two largest diamond producers say market is stabilizing after several months of severe cutbacks in rough sales. Christie’s and Sotheby’s sales.
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Imitation Opal with Interesting Play-of-Color Pattern

New imitation opal displays pronounced play-of-color phenomenon in a unique pattern covering large surface areas.
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Dyed Serpentine Imitating Sugilite

Advanced testing confirms dyed material as serpentine, rather than the sugilite it was meant to imitate.
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Resin Imitation Ivory with “Engine-Turned” Structure

Resin imitation ivory can display striations similar to those in elephant and mammoth ivory.
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