IGI is the largest organization of its kind, with offices in Antwerp, New York, Hong Kong, Mumbai, Bangkok, Shenzhen, Dubai, Tel Aviv, Cavalese, Toronto, Los Angeles, Kolkata, New Delhi, Thrissur, Surat, Chennai, Ahmadabad, Cavalese, and Shanghai. The IGI School of Gemology operates from Antwerp, Dubai, Shanghai, as well as six schools in India and four in Italy, offering a variety of courses designed for professionals and consumer enthusiasts alike.A certificate from IGI represents the all-important 5th C that no one should be without: Confidence. As the world's largest independent gem certification and appraisal institute for diamonds, colored gemstones and jewelry, IGI is a standard of excellence for industry professionals and consumers around the globe.