International Gemological Institute
IGI is the largest organization of its kind, with 18 laboratory locations certifying the widest variety of gemstones and jewelry in the world, and 14 schools of gemology offering the industry’s widest range of classes and diploma programs.
IGI has been an industry leader since 1975, introducing inscription and identification technologies, finished jewelry grading, co-branded certification, diverse scholastic programs and many other initiatives designed to improve and empower jewelry professionals.Today IGI is the most trusted name for thorough, objective and expert certification of diamonds, gemstones and jewelry.