Established in 1931, the nonprofit Gemological Institute of America (GIA) is the world's foremost authority in gemology. GIA's mission is to ensure the public trust in gems and jewelry by upholding ...

Beauty is in the eye of the beholder. But quality is a matter of science. At the Gemological Institute of America, we’ve spent nearly 100 years ensuring that diamonds, colored stones ...

We’re placing a remarkable resource—almost 80 years—of groundbreaking gemological knowledge at your fingertips. Gemological Characteristics of Saltwater Cultured Pearls Produced After ...

U-Pb Ages of Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic Origin The Talisman of Charlemagne: New Historical and Gemological Discoveries ...

A GIA diamond grading lab in Carlsbad, Calif. Jacques has been at the helm of the Gemological Institute of America, also known as GIA, for 10 years. Prior to joining GIA she served as president ...

Jacques has been at the helm of the Gemological Institute of America, also known as GIA, for 10 years. Prior to joining GIA she served as president and CEO of Borsheims Fine Jewelry and Gifts in ...