Diamond Grading and Gemological Reports

There are a range of gemological institutes that assess diamonds and issue Diamond Gemological Reports, as well as measure and certify loose diamonds and diamond jewelry. Depending on your region, there are a number of highly regarded companies including the following listed below.

HRD - Hoge Raad Voor Diamant (The Diamond High Council). The officially recognized representative of the Belgium diamond trade and industry. HRD headquarters are situated in Antwerp, World Diamond Center.

GIA -Gemological Institute of America. Founded in 1931 in Los Angeles, the GIA formed and introduced the international grading system. Headquarters are still situated in Los Angeles.

IGI - International Gemological Institute. The oldest institute of its kind in Antwerp. Set up in 1975 with labs in New York, Bangkok, Mumbai and Tokyo.

GemScan - GemScan International was included in 1985 as an autonomous jewelry appraisal laboratory if gem identification. GemScan is based in Toronto, Ontario Canada.

AGS - American Gem Society Founded in 1934 by Robert M. Shipley who also founded the GIA. The AGS is based in Nevada, USA.

EGL - European Gemological Laboratory. EGL was initially opened in Antwerp in 1974, and now has laboratories in Antwerp, New York Los Angeles, Johannesburg, Paris, London, Israel and Seoul.