Sterling silver and 999 silver are subordinate relations, generally 999 full silver is called sterling silver.
Is 999 pure silver sterling silver
Two, a variety of sterling silver classification
1. 999 kilobytes of silver
Purity is 990, called solid silver, silver content of 90%. 999 and 990 are soft because of their high silver content, so they are suitable for making plain silver jewelry.
3. 925 silver