At the intersection of Zhonghua Road and Beichen West Road, Donghai County, Lianyungang City, north100m (northwest of Hu Yi Garden).

2. Zhong Da Jewelry Appraisal Center

No.3-110, Long Ming Commercial Street, Jingyu Central Community, Donghai County, Lianyungang City, Jiangsu Province.

Tel 18082056668

3. Jewelry Quality Supervision and Inspection Center of China Business Federation

West of the intersection of Zhonghua Road and Binhe South Road100m.

Extended data 1: magnifying glass

Zircon is very similar to diamond and is the best substitute for diamond. The identification method is that zircon has polarization and large birefringence. Observing the processed zircon prism surface with a magnifying glass of 10 times, it can be seen that the bottom edge line has obvious ghost, but the diamond has no ghost phenomenon.

Two: portable microscope

Nowadays, with the development of science and technology, glass products are mostly counterfeit, which is often difficult for many old experts to distinguish with the naked eye. It is easy to distinguish glass products with the help of portable microscope (such as Ainiti, Diguang, etc.). ). Because there are bubbles in the production of glass products, we can clearly see the bubbles in the glass when we look at the glass products with a portable microscope and zoom in 200 times. So you can tell whether it is a glass product or not.