The Gemological Institute of America(GIA)?
Headquartered in New York, the GIA was established in 1931 as a non-profit educational resource for the gem and jewellery industry. The Institute’s aim is to provide the industry and the public with an independent, objective opinion regarding the quality of the diamond and as an unbiased arbitrator of standards in diamond grading in order to secure the public’s trust. Every stone submitted for certification is meticulously checked by numerous professionals to ensure maximum accuracy and grading consistency for client protection.
GIA was responsible for developing the first internationally accepted Diamond Grading System with unbiased opinions of the quality of polished diamonds by applying uniform criteria to their grading. It also introduced the foremost diamond report in setting the standard for diamond quality documentation around the world.