Certificates of merchants selling jewelry and jade can be found on many authoritative websites, such as the Jewelry Quality Inspection Center of China Business Federation and the Guangzhou Quality Inspection Center of the Ministry of Land and Resources. The contents include appraisal results, quality, color, shape, inlaid metal marks and other items, and are also signed by inspectors and auditors.
An industry insider said that if the identification certificate has marks such as CMA (China Metrology Certification) and CAL (Quality Supervision and Inspection Organization Certification) and the steel seal of the inspection center, and can be inquired in official website, it means that the product conforms to the certificate identification. "If the composition meets the standards of the corresponding jade, you can issue the corresponding certificate. However, the certificate can only identify the types of jade and precious stones, not their quality and price. "
Extended data:
The choice of gold inlaid jade is very particular. First of all, the color of jade in gold inlaid jade becomes the first choice. The kind of color and the degree of hue. Furthermore, the texture of jade is used. The jade used for medals should be very delicate in texture and fine in particles. The impurities contained in it must be original and cannot contain any spots and impurities, which seriously affects the beauty and value of gold inlaid jade.
Gold inlaid jade can't have jade grain, and this kind of jade can't be used, no matter the jade grain formed during processing and mining. In short, the texture, transparency and color of jade are very strict.