CNAL California CMA .CMA is the basic requirement of national laws for testing and inspection institutions, and it is necessary for all jadeites. CAL refers to the symbol certificate of the inspection organization recognized by the national quality inspection, and it is one of the three certificates of jadeite. CNAL is the symbol of national laboratory and one of the three certificates of jadeite.

Jade double certificate is jade jewelry appraisal certificate and carving master certificate, and there is no modern certificate for the three certificates. Jewelry appraisal certificate is a public trust certificate issued to the authenticity and attributes of rare precious metals, precious stones or jewelry products, which is implemented by professional institutions and professionals who meet the appraisal qualifications.

Different grades, credits. Different grades. Jade certificate is a professional certificate held by experts who identify jade, and the certificate of jade double certificate can't keep up with the grade of three certificates. Credit. In the eyes of professionals, the credibility of jade double certificate is low, and the credibility of three certificates is high.

Commodity three certificates refer to production license, product certificate and quality guarantee. A production license is a certificate granted by the state to an enterprise that has certain production conditions and can guarantee the product quality.

The "three certificates" of products are production license, factory certificate and quality guarantee. A production license is a certificate granted by the state to an enterprise that has certain production conditions and can guarantee the product quality. Short names of various certificates.