S925 silver ornament is an alloy of 92.5% pure silver and 7.5%. The addition of alloy improves the luster, brightness and hardness of silver. Now 925 is the standard for judging whether it is sterling silver jewelry. After polishing, 925 silver jewelry has a very beautiful metallic luster and a certain hardness, which can be inlaid with precious stones and made into high-grade jewelry.
S990 foot silver is 99% pure silver and 1% alloy. Because of its lack of hardness, it is easy to deform after being made into jewelry, so few manufacturers use it to make jewelry, and 990 silver is widely used in industry.
Determination method of silver content: Silver ornaments should generally be marked with English abbreviation or "Sterling". The imprint of standard silver is S925 or 9.25 imprint. The foot silver label is S990.