National Jewelry Quality Supervision and Inspection Center, Address: No.2 A, Datun Road, Chaoyang District, Beijing, Tel: 6487 197 1.
Bao Zhongxie Gemstone Testing Center, Address: Floor 1, Affiliated Building of Ministry of Land and Resources, No.30 Xisiyang Hutong, Beijing, Tel: 66557585.
Gem Appraisal Center of Peking University, Address: Room 3303, New Teaching Building of Peking University, Zhongguancun, Haidian District, Tel: 0 10-62755676.
China Geo University Dida Gemstone Inspection Center, Address: No.29 Xueyuan Road, Haidian District, Tel: 82323039.
Anti-counterfeiting product quality supervision and inspection center of the Ministry of Public Security, Address: Room 5 18, Building 7, Li Nan/KLOC-0, Mudi, Xicheng District, Beijing, Tel: 63537336 66024598?
These formal appraisal centers all have appraisal certificates, but they all charge fees and the prices are different.
Extended data:
The identification methods of jadeite jade are as follows:
1, water drop identification method: drop a drop of water on the jade. If it stays dewy for a long time, it is a real jade, and if the water drops disappear soon, it is a fake and inferior product.
2, touch method: if the real jade is touched by hand, there is a feeling of cold and lubrication.
3. Inspection method: put the jade in bright places such as sunshine and lights. If the color is transparent and evenly distributed, it is a real jade. Fourth, the tongue licking method uses the tip of the tongue to lick the real jade, and the fake jade has no astringency. Finally, if possible, zoom in to see if there are any cracks. The jade without cracks is of high quality, followed by the one with cracks. The more cracks, the lower the value.
References:
Baidu encyclopedia-jade identification