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Carlsbad, CA—GIA (Gemological Institute of America) recently encountered a number of stones falsely inscribed with GIA report numbers. The stones were submitted for updated reports or verification services, but did not match the GIA report submitted with them. The group included both laboratory-grown diamonds and treated natural diamonds. Image: A diamond inscribed by GIA for a Laboratory-Grown Diamond Report with the number obscured for confidentiality and the phrase "Laboratory-Grown."

Consistent with GIA’s mission to protect consumers and ensure their trust in gems and jewelry, the Institute overwrites the counterfeit inscriptions with Xs, issues a new, accurate report, and inscribes the newly-submitted stone with the number of the new report and, when appropriate, the phrase ‘Laboratory-Grown.’

The newly-submitted stones had the following commonalities: (1) the weights and grading parameters of the original and newly-submitted diamonds were close to each other; and (2) the newly-submitted diamonds were inscribed with counterfeit inscriptions of the original GIA report number.

In a recent example, the report that accompanied a diamond submitted for an update was for a 1.50362 carat, VVS2, E, type I natural diamond with an excellent cut grade. The newly-submitted stone with a counterfeit inscription was a man-made diamond, 1.51212 carat, VVS2, D, type IIa with a very good cut grade. It is clear these are two different diamonds. GIA says these instances of attempted fraud highlight why it is important, especially in any transaction where the buyer does not have a trusted relationship with the seller, to have the diamond grading report updated prior to completing a purchase.

Depending on the circumstances of stones submitted with counterfeit inscriptions, GIA considers all of the options outlined in GIA’s Client Agreement—including notifying the submitting client, law enforcement, and the public.

GIA will overwrite the counterfeit inscription with Xs. Image: GIA.