The full name of FM is Forevermark, and the Chinese name is "permanent stain", which is a brand diamond launched by De Beers Group. The difference between FM diamond and ordinary diamond is that the mark of ordinary diamond is engraved on the waist of diamond, while the mark of FM diamond is engraved on the table. Usually, if ordinary diamonds need to be imprinted, it will have a certain impact on the weight of diamonds, while FM imprinting has little impact on the weight.

At the same time, it is precisely because of the high-tech marking method that he has higher requirements for diamonds and greater requirements for defects. De Beers claims that only 65,438+0% diamonds can become FM diamonds, and each diamond in FM is a unique symbol.

In terms of cost, FM diamonds are also higher than ordinary diamonds, so the price will be higher than ordinary GIA.

At present, there are FM diamonds sold in China: Chow Tai Fook (nationwide), Donghua (Shanghai), CC Kamei (Taiyuan, Xi 'an), Tijue (Chengdu, Ningbo), Arendt (Beijing, Tianjin, Chongqing), Chaohongji (Dalian, Shenyang), Diamond Family (Guangzhou), Jun 'an (Shenzhen) and Caibai (Caibai).