Sterling silver
Sterling silver is an alloy of silver containing 92.5% by weight of silver and 7.5% by weight of other metals, usually copper. The sterling silver standard has a minimum millesimal fineness of 925.
History
The origin of the term "sterling" is uncertain. One theory is that it derives from the Old English word "steorling," meaning "little star," possibly referring to the small star that appeared on early Norman pennies. Another theory suggests it comes from the name "Easterlings," a group of traders from the Baltic region who were known for the quality of their silver.
Composition and Properties
Sterling silver is composed of 92.5% pure silver and 7.5% other metals, typically copper. The addition of copper makes the silver harder and more durable, which is essential for items that are subject to daily wear and tear, such as jewelry, cutlery, and coins.
Tarnishing
Sterling silver is prone to tarnishing, a process where the surface of the metal reacts with sulfur compounds in the air, forming a black layer of silver sulfide. Regular cleaning and proper storage can help prevent tarnishing.
Uses
Sterling silver is widely used in various applications, including:
- Jewelry: Rings, necklaces, bracelets, and earrings.
- Cutlery: Spoons, forks, and knives.
- Coins: Historical and commemorative coins.
- Musical instruments: Flutes and other wind instruments.
- Decorative items: Picture frames, candlesticks, and trophies.
Hallmarks
Sterling silver items are often stamped with a hallmark to indicate their purity. Common hallmarks include "925," "Ster," or "Sterling." These marks are usually found on the underside or back of the item.
Care and Maintenance
To maintain the appearance of sterling silver, it is important to clean it regularly. Methods include:
- Using a soft cloth and mild soap.
- Applying a silver polish.
- Storing in a tarnish-resistant cloth or bag.
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