If you want to learn gem identification, you can go to Beijing University of Finance and Economics, where there is gem appraiser training for social students (but there are only classes in the afternoon, evening and weekend, and the rest of the time we formal students are in class). In addition, Wuhan Geo University also has this major, but the tuition is high and the depth is large, which is not suitable for beginners. If you want to learn the general and practical methods of gem identification, you can go to Baidu Post Bar "Gem", and so can I. If you want to contact some more advanced experts, I suggest you go to this website and ask Dr. Yang questions. But be careful, don't be as general as you asked above! /index.asp