from a press release
GIA Notifies Trade of Potential Undisclosed Diamond Treatment
CARLSBAD – May 12, 2015 – Approximately 500 colorless to near-colorless diamonds submitted primarily to GIA’s grading laboratory in Ramat Gan, Israel, were potentially subjected to an undisclosed temporary treatment.
GIA believes that the treatment temporarily masks the body color of the diamond, resulting in a color grade that can be up to three grades higher than its actual grade.
The Institute has terminated client agreements with the companies that submitted the diamonds in question and has notified appropriate trade bodies.
The report numbers of the potentially treated stones are posted on the GIA's website at: (http://www.gia.edu/gem-lab/
Anyone who has purchased or has access to any of these diamonds is asked to submit them to any GIA lab for a no-cost, expedited review.
An independent nonprofit organization, GIA (Gemological Institute of America), established in 1931, is recognized as the world’s foremost authority in gemology. GIA invented the famous 4Cs of Color, Clarity, Cut and Carat Weight in the early 1950s and in 1953, created the International Diamond Grading System™ which, today, is recognized by virtually every professional jeweler in the world.
Through research, education, gemological laboratory services, and instrument development, the Institute is dedicated to ensuring the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science, and professionalism. Visit www.gia.edu.