Is the GIA diploma the most authoritative? Where is the training point in Chinese mainland? How much are the tuition fees for gems and diamonds, and how long are the school hours? Which is more useful? Gia's certificate is issued by Gemological Institute of America, which has certain authority in the world. So are the Gemological Institutes in Belgium and Britain. In China, it's usually just training, and then regular exams! The cost is relatively high, almost 65438+ RMB! And it lasts for a long time. In fact, domestic universities also have relevant certificates, such as GIC certificate from China Geo University! If you want to study systematically, it will take about half a year! The cost of gem+diamond double certificate is about 10000 RMB!