There is no doubt that your diamond ring has no certificate, or the certificate is lost, so the merchant made the certificate locally. This kind of certificate is the certificate of the ring all day, which can't explain the situation of the diamond, or the situation of the diamond is very general. The diamond ring in Xie Ruilin is very expensive. What you bought at this price is only 30 cents. In fact, you can buy 50 cents at the same price.