It's true that there is this center, and there is a website to check the number. I once bought a 20,000 diamond ring with the same certificate, and later went to the municipal appraisal center for appraisal, which was almost accurate. However, the value of things bought by lottery in shopping malls generally does not reach the price of things you buy, and many of them are deceptive. There is also an appraisal center, which only appraises the authenticity of things, whether they are natural or not, because jade-like things can be really cheap according to their color. So jade has a certificate and it doesn't mean anything. However, the identification of diamonds has descriptions of weight, color, purity and cut, which can be used as a price reference. I checked your things. Take a look: certificate number. : 99000 185804 (serial number) Jewelry name: Hetian jade ring (jewelry name) Color: green (color) Total mass: 2.62g (total mass) Precious metal inspection: seal: S925 (precious metal inspection) Enlarged inspection: fiber felt.