The national regulations on jewelry identification are generally gold AG, silver S, platinum PT and palladium PD, and then they are identified according to their contents, such as AG9999, AG750 (white gold jewelry and colored gold jewelry, rose gold jewelry), AG 18K (gold jewelry is 18K gold jewelry), S925, S990 and PT950. Then you can mark the corresponding jewelry brand in Chinese and English. The general format is (taking Nanjing Baoqing Silver House as an example): BQ S925 X.

The meaning of this sign is BQ (Baoqing Jewelry Store), S925(925 Silver Products) and X (Worker's Work Number);

For example, diamond jewelry will be: BQ PT950 J D 0.50 indicates Baoqing Platinum 950 job number D on the small sign of the ring or necklace, which means diamond here, and 0.50 means the weight of the diamond is 0.50 carat.

Wu, let's see if there is a mark on the back of your necklace. If not, maybe your necklace is an ornament.