Who knows the address and telephone number of Changchun professional jade jewelry testing and appraisal institution? Please tell us, thank you. ...

1. If you want to identify jade, you can also go to the Jewelry and Jade Quality Inspection Center. Generally speaking, every provincial capital city will have a jewelry and jade quality supervision and testing center. This institution was originally affiliated to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources, and it is also very authoritative.

Secondly, auction is a very dangerous investment. Everyone must consider the risks before they participate, otherwise both people and money will be lost. You don't have such an institution over there. Antique auctions are currently concentrated in Shanghai, Beijing and Qingdao. Collectors must compare and know more before participating. I wish you a fortune.

3. To identify jadeite, you can go to the local jewelry and jade quality supervision and testing center, which is more authoritative. In addition, in some jade crystal wholesale distribution centers, such as Sihui, Donghai and other cities, there will also be gem testing institutions.

4. Qualification of testing institutions, and the formal quality inspection certificate of jewelry and jade must be a nationally recognized testing institution. The inspection certificate must be printed with any one of cma, cal and cncal. China Metrology Certification Association consists of national or provincial metrological certification and accreditation institutions and accredited metrological certification units.