In the recent hacking case, whererin1, 042 diamonds had their grading reports altered fraudulently, only 175 have been returned for the examination to the Gemological Institute of America. 

However, the lab said it is imperative that all of the diamonds and their reports be returned for examination to remove the fraudulently altered reports from the market. GIA said it will offer a no-cost confirmation service for any diamond grading report originally issued from November 2014 through October 2015. 

It may be recalled that the hack was revealed late last October and led the organization to invalidate the grading reports for 1,042 diamonds.