Because the jewelry appraisal certificate is a public trust certificate of the authenticity and attributes of precious metals, precious stones or jewelry products, it is issued by professional institutions that meet the appraisal qualifications and professionals with post qualifications.

China's regular jewelry testing institutions will be restricted by national supervision and laws, so first of all, on a jewelry appraisal certificate, we will definitely see some or all of the following signs: CNAS, ilac-MRA, CMA, CAL and CNAL. Seeing any of the above signs shows that the evaluation agency is effective. Among them, CMA is the basic requirement of national laws for testing and inspection institutions. As long as it is on the certificate of a formal appraisal institution, you will see this sign, so if you don't have these, change them quickly.