Whether buying jewelry online or in a physical store, if you don't know much, you can ask for an appraisal certificate. Agate is a common gem, so it is very cheap. You can contact the shopkeeper and ask him to issue an appraisal certificate. Since what you bought is inlaid, go to the National Jewelry Appraisal Center and pay 8 yuan for each appraisal certificate. This can not only test whether your gem is natural, but also test whether the bottom of the bracelet you bought is silver or other metal. So you can rest assured. ...

If you don't understand anything about the problems mentioned in the appraisal certificate, you can continue to communicate and help you answer them.