Hanjiang Road, Nanjing, Nanjing 1 There is a jewelry product quality inspection station of Nanjing University, Jiangsu Provincial Bureau of Technical Supervision, which is responsible for the quality inspection of jewelry and jade. Turquoise, as a kind of gem, meets the inspection standard. High professionalism.

2. Jiangsu Gold and Jewelry Testing Center is located in Longpan Middle Road, Nanjing. It is a gold and jewelry testing institution approved by the administrative department of Jiangsu Province on February 8, 1993. Its business includes nondestructive testing of precious metals, diamond grading, gem identification, identification and value evaluation of precious metals and gem crafts, as well as related business consulting and training. The detection and inspection of turquoise is more detailed.