First of all, pawnshops can be appraised, but because of the limited instruments, many things can't be appraised, and they can't issue appraisal certificates.

Secondly, there are many appraisal sites in Haidian, such as the "Jewelry Quality Supervision and Inspection Center of China Business Federation" on the sixth floor of Wante, Xinjiekou; Xueyuan Road has the Jewelry Testing Center of China Geo University in China Geo University and the Jewelry Testing Center of Peking University in Peking University. Datun also has the National Jewelry Quality Supervision and Inspection Center.

Finally, the real certificate has a detailed description of the identified jewels and jade. First, the most important thing is the appraisal result; The second is the number of the certificate; Furthermore, it is a description of the sample to be identified, including shape, color, total mass, density, optical characteristics, refractive index, absorption spectrum, amplification inspection, remarks, etc., because the identification result is based on a comprehensive conclusion of multiple identifications and cannot be judged by one item. Appraisal institutions like those mentioned just now are recognized by the state and dare not issue false certificates. Once the quotation is sealed, it has legal effect, and the false certificate will be punished by the state.