Analysis & Grading

GIA Laboratory Alerts


Fraudulent Emails

September 20, 2023 – GIA has received several notifications from clients advising that they have received suspicious emails that appear to be from GIA. The most recent, reported in the trade press, claimed to be a ‘Weight/Measurement Difference Notification.’ Many of these messages have the characteristics associated with ‘phishing ‘emails, including email addresses that do not match the sender’s name, have obvious grammatical or spelling errors, or unusual links or attachments. Please note that this was not issued by GIA and would strongly advise that you do not click on any of the links in that email and report it as spam. Should you receive any suspicious or questionable communications in the future, please don’t hesitate to reach out any time.

Counterfeit Inscriptions Identified

February 23, 2021 – Recently, GIA (Gemological Institute of America) encountered a number of stones that were submitted for updated reports or verification services that did not match the GIA report submitted with them. Consistent with GIA’s mission to protect consumers and ensure their trust in gems and jewelry, the Institute overwrites the counterfeit inscription with Xs; issues a new, accurate report; and inscribes the newly-submitted stone with the number of the new report.

  • Read the press release here.

Altered Reports Invalidated

November 25, 2015 – To address concerns in the trade following GIA’s action to invalidate potentially altered grading reports, GIA will offer a no-cost confirmation service for any diamond grading report originally issued between November 1, 2014 and October 31, 2015. All requests for the no-cost update service must be received by GIA by January 30, 2016.


October 26, 2015 – GIA has updated the list of 1,042 invalidated diamond grading reports with the client accounts that submitted the diamonds in question.

October 23, 2015 – GIA has invalidated 1,042 diamond grading reports that were altered by an outside party who gained unauthorized remote access to GIA’s grading information database before the reports were printed and provided to the submitting clients. Anyone in possession of any of these grading reports or diamonds is strongly requested to return them immediately to GIA.

Diamonds with Temporary Color Treatments

July 25, 2015 – The list of diamonds submitted to GIA that were potentially treated to temporarily improve color grades has been updated. The report numbers of the diamonds returned for re-grading have been removed. We urge all clients and trade organizations to assist in resubmitting the remaining diamonds.