International Gemological Institute - USA

IGI, a Blackstone portfolio company, is the world’s largest independent provider of gemological services. With 31 advanced laboratories and 18 gemology schools worldwide, IGI is a trusted industry partner, committed to objectivity and accuracy. With state-of-the-art laboratories in New York City and Los Angeles, IGI USA delivers expert gemstone evaluation, reporting, and education to professionals and consumers from coast to coast. Our comprehensive services include the analysis of natural and lab-grown diamonds, colored gemstones, finished jewelry, appraisals, and educational programs.