Where can I identify the authenticity of jade?

First, look at the inspection agency. The state has strict qualifications for jewelry and jade quality appraisal institutions. Only after passing the accreditation can the appraisal certificate issued be valid.

The jewelry and jade appraisal certificate issued by it has the words CMA (the mark of the National Bureau of Quality and Technical Supervision’s measurement certification), or CAL, CNACL. Each of these letters is valid, especially the first mark. CMA, that is the certification mark required by national law. When consumers purchase jewelry appraisal certificates with the CMA logo, it proves to a large extent the authority of the appraisal certificates used by merchants and the guarantee of product quality.

1. "CMA"? A metrology certification review agency composed of a country or a province, a metrology certification unit that has passed the review. The basic requirements of national laws for testing and inspection institutions. Institutions with this mark are legal inspection institutions.

2. "CAL"? It is the mark of a testing and inspection agency approved by the national quality review. Institutions with this mark are qualified to make arbitration inspection conclusions. The quality of work of institutions with CAL is better than that of institutions with only CMA. , the reliability has been further improved.

3. "CNACL"? The mark of a national laboratory. According to the relevant agreement on China's accession to the WTO, the "CNAL" mark can be mutually recognized internationally, such as: the United States, Japan, France, Recognized by Germany, the United Kingdom and other countries.

Second, the test content includes the name of the jewelry, color, clarity, total mass, density, refractive index and other items. These items are inspected very strictly by nationally certified jewelry and jade testing institutions.

Third, look at the signature of the appraiser. The appraisal certificate needs to be signed by two appraisers to be valid. One is the appraiser and the other is the checker.

Four, look at the seal. Strictly it should be a steel seal, and the fonts on it should be clearly legible.

Five, look at the number. The serial number on the back of the appraisal certificate must be consistent with the serial number on the back of the physical object.

Sixth, some certificates have websites or can be checked via SMS. If you are not sure, you can check it. Enter the number and you will be able to find the style you purchased (if it is genuine) ).