2. Jade identification certificate When consumers buy high-grade jade jewelry, they should ask the merchants whether the jewelry they buy has an identification certificate. If there is an authentication certificate, they should check whether there is "CMA", "CAL" or "CNAL" on the certificate. Jade hand appraisal certificate. There is no uniform requirement for the serial number of jadeite appraisal certificate. Different jewelry and jade appraisal institutions will have their own certificate numbering system. The name, address, telephone number and website of the appraisal institution are on the appraisal certificate. You only need to open the website of the authentication institution and enter the serial number of the authentication certificate in the place where the certificate is queried, so you can query the authenticity of the certificate.
3. If you can't find it on the website, there are two situations. One is an old certificate, which can't be found online. You can call the evaluation agency. The other is false certificate, but there are many such false certificates. I suggest you go to the local authoritative jewelry appraisal agency for re-inspection to safeguard your rights and interests.