The Main Laboratories

Since the creation of the GIA in 1931, other laboratories have appeared and are now renowned institutions:

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GIA (Gemological Institute of America): founded in 1931 in the US.


 AGS (American Gemological Society): founded in 1934 in the U.S.


GCL (Central Gem Laboratory): founded in 1970 in Tokyo.


HRD (Hoge Raad voor Diamant, or Diamond High Council): founded in 1973 in Antwerp.

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EGL (European Gemological Laboratory): founded in 1974 in Belgium.

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IGI (International Gemological Institute): founded in 1975 in Antwerp.




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