International Gemmological Institute (India) Limited International Gemmological Institute (India) Limited provides certification and accreditation services for natural diamonds, laboratory-grown diamonds, studded jewelry, and colored gemstones in India and internationally; it offers diamond screening, sorting, grading reports, identification and appraisal reports, laser inscription services, and educational programs through schools of gemology. The company, part of the IGI group that originated in Belgium in 1975, maintains a global network of 31 laboratories across 10 countries and 18 schools across 6 countries, with headquarters in Mumbai, India, and serves over 7,500 customers including jewelry brands and retailers in key markets such as India, the United States, and China. Recent developments include Blackstone Group's acquisition of the IGI group in May 2023, proposed restructuring for IGI India to acquire full ownership of IGI Belgium and IGI Netherlands to consolidate global operations, and enhanced management with new appointments in CFO, CHRO, CMO, and country managers, alongside strong financial growth evidenced by record quarterly revenues and profits in 2025.