1. In China, there is not only one institution for jadeite appraisal certificate. At present, there are three kinds of most common jadeite appraisal certificates in the market, namely, national inspection, provincial inspection, universities and third-party inspection institutions.

2. The State Inspection is affiliated to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources. It is the maker of China's jewelry industry standards and the most authoritative testing institution, referred to as NGTC.

3. Provincial inspection refers to the jewelry and jade appraisal centers in various provinces. For example, Yunnan Jewelry and Jade Quality Supervision and Inspection Institute is a representative provincial inspection institution with jade detection ability and authority.

4. Universities and third-party testing institutions are established by some universities with jewelry majors or some private enterprises, but these institutions will have lower testing standards for personal reasons. Of course, the cost of testing is also cheaper than that of national inspection and provincial inspection, and merchants are willing to use it.

5. Have you found a * * * similarity among these certificates, that is, the jadeite appraisal certificates of these authoritative organizations must be marked with "CMA", "CAL" or "CNAL", and "CMA" is necessary. If not, it proves that the appraisal institution has no appraisal qualification at all and is not credible.

6. Another formal jade appraisal certificate, in addition to the English logo above, will also have the product picture, certificate number and agency seal.