Hello, I am engaged in jewelry appraisal. The provincial technical supervision bureau and the local technical supervision bureau are the most authoritative, but the appraisal price is a little higher. Secondly, there are gem research institutes and geological research institutes in every place, and then there are local enterprise evaluation institutes with brand concepts, such as Peking University Evaluation Institute, Land Evaluation Institute and evaluation institutions named after small places. Many of them are private, the price will be cheaper, but the reputation will be a little worse than the previous ones. But if your baby is ordinary, you can get it in a place like this.