Diamond jewelry generally has a certificate, and online stores also let you test diamonds yourself. If you find that the test results are inconsistent with the certificate given by the store, you can also apply for a return ... The key is to see if the diamonds in that store have a certificate of conformity, whether the store has cancelled the warranty, and whether it can be returned ... So online shopping for diamond jewelry will not have any problems, and the price is much cheaper than that in the store. Don't worry ~ ~