1. The jadeite appraisal certificate is issued by the appraisal institution. If you are in doubt about buying jade, you can go to the appraisal institution in your province and city for monitoring, and the cost is about tens to hundreds of yuan. Generally, a formal appraisal institution needs to have three certifications recognized by the state, that is, any one of CMA, CAL and cncal must be printed on the inspection certificate. China Metrology Certification Association is a national or provincial metrological certification and accreditation institution, and it is an accredited metrological certification unit. CAL is a nationally recognized testing institution. CNACL is a testing organization accredited by China Laboratory.

2. When you are in doubt about buying jade, large jade shops and jewelry appraisal institutions can appraise jade. There are nearly 100 jade appraisal institutions in China, among which most provinces and cities have jewelry appraisal institutions. So when you are in doubt about buying jade, you can go to the appraisal institution in your province and city for monitoring, and the cost is about tens to hundreds of yuan. But for beginners, the most direct way to buy jade is the jade certificate, which must be issued by an appraisal institution at or above the provincial level, with legal effect and can be trusted.