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. The jade appraisal certificate of the national inspection is as follows: Provincial inspection refers to the jewelry and jade appraisal centers in various provinces, such as Yunnan Jewelry and Jade Quality Supervision and Inspection Institute, which is a representative provincial inspection institution with jade detection ability and authority at present. The jade appraisal certificate of Yunnan provincial inspection is like this: universities and third-party inspection institutions are set up by some universities with jewelry majors or some private enterprises, but these institutions will have lower inspection standards for personal reasons. Of course, the inspection fee is cheaper than national inspection and provincial inspection, and merchants are willing to use it.
3. 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.
4. Another formal jade appraisal certificate, in addition to the English logo above, will also have the product picture, certificate number and agency seal.