A subsidiary company of the Gemological Institute of America Enterprises, which provides professional grading and identification for the diamond and colored stone industries.
See Alexandrite Tsarstone collectors guide, Definition of GIA Gem Trade Laboratory, http://m.alexandrite.net/viewpage.html?id=GG-092-00005 (A subsidiary company of the Gemological Institute of America Enterprises, which provides professional grading and identification for the diamond and colored stone industries.) (as of Apr. 03, 2026, 14:21 GMT).