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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Dyed Serpentine Imitating Sugilite

Advanced testing confirms dyed material as serpentine, rather than the sugilite it was meant to imitate.
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Holiday Sales Predictions, Sotheby’s Sales

U.S. holiday sales predictions are better than expected. Sotheby’s Hong Kong auction features a 100 ct yellow diamond necklace by GIA alumna Anna Hu.
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Intergrown Emerald Specimen from Chivor

An emerald specimen from Chivor hosts a large, well-formed emerald inclusion.
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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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