Hehe, I'm going to Chengdu University of Technology for postgraduate study after school starts this year. This major is very popular at present. Many technical schools and colleges offer this major. Chengdu University of Technology does have this major, but what I know now is undergraduate and master's degree.

If you want to study this major through training, you can see if there is a local technical school, because I don't know much about it yet. If you have more free time, I suggest you go to China Geo University (Wuhan) for training, which is more formal. You are the dean of Jewellery College, and you can take the appraiser after you finish your study. Self-study can be tested, but it is very troublesome to have work experience and some proof materials of experience.