Donghai International Jewelry City does have a gem quality inspection center, which is located in the northeast corner of Niu Ben Square in Donghai County.

If it needs to be tested, it can be taken to the East China Sea. Of course, its test focuses on crystals.

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I'm not sure about other tests.

God, many of these certificates were bought directly by sellers. If you want to identify this stone, you'd better take it yourself.

Of course, the certificates are real, not fake, and it is basically impossible to find these certificates online!