GIA 350x200_LONDONFor more than 80 years, GIA has been the world’s foremost authority in gemmology – the place people turn to for answers, and to learn from the creators of the 4Cs and the International Diamond Grading SystemTM. Our education, laboratory services, instruments, and research set the professional standards for the global gem and jewellery industry. GIA is proud to offer you the knowledge and credentials, in gemmology and jewellery manufacturing arts, that you need to reach across the world. Join us for an online education, or on campus at any of our global education locations, including places like London, Hong Kong, Bangkok, Taipei, and more.