What’s the difference between S990 silver and s925 sterling silver ?

The chemical properties of silver are very active,. under the high temperature silver without plating in the light is easily contact with the sulfur dioxide in the air then will produce chemical reactions, the formation of black silver sulfide.

First, the two silver content is different. S990 silver content of 99% silver, and s925 sterling silver is 92.5% of sterling silver, They are internationally in sterling silver standard.

now s925 silver usually plated palladium rhodium, To prevent the yellowing of the silver in the case of oxidation or vulcanization. In the current silver jewelry market most of the use of s925 silver, commonly used in mosaic, imitation K gold, platinum style.

Second, the hardness is different in two silvers . s990 silver is hard and s925 sterling silver hardness is soft.

Third, s990 silver is often used to make jewelry style, such as bracelets, lock bags and so on.