The Gemological Institute of America (GIA) is cooperating with the Indian police authorities investigating the unauthorised remote access to GIA’s grading information database and the alteration of 1,042 diamond grading reports.

Two former employees of Tata Consultancy Services (TCS) are currently in custody. The police informed GIA that the investigation has reached a point where they may now publish the client accounts that submitted the diamonds in question.

A list of the invalidated reports is posted here on the GIA website. The list includes the number and issue date of the invalidated reports, the shape and weight of each diamond, and the submitting client account. The list does not include colour or clarity grades as those may have been altered. Pending continued investigation by the Indian police, the listed client accounts have been suspended from further submissions to GIA at this time.


GIA strongly requests that anyone in possession of any of these diamonds and grading reports return them immediately to GIA for examination at no charge.