First: Diamond rings bought in brand stores are generally more expensive. Online shopping can choose physical stores and online sales stores, with higher cost performance and guaranteed quality.

Second: Minute, carat and gram all refer to the weight unit of diamond, 100 minute = 1 carat, that is, 0.2 gram.

Third: the international price of 0. 175ct general quality is 857 yuan, and 3 grams of pt900 material: 448 yuan/gram *3/ gram = 1344 yuan.

Fourth: Generally, diamonds with a score of more than 30 will have the most authoritative GIA certificate in the world. Diamonds below 30 points generally have no GIA certificate, and they are all finished products certificates.