Sterling silver is a mixture of pure silver (92.5 percent) and alloy metal (7.5 percent). Sterling is primary used for jewelry. The only way jewelers can claim that a piece is silver is if at least 92.5 percent of the piece is pure silver. If the jewelry meets these requirements it can be labeled as "silver," "solid silver," "sterling silver," or "sterling."
Caring for Your Silver:
Properly caring for your precious metals can keep them looking their shining best. It is a good idea to store your silver in a cool, dry place. Like other precious metals, sterling silver can oxidize over time. If your jewelry does tarnish, you can restore it by using a paste, liquid polish, or a treated cloth to clean it.
You can also ask your jeweler for professional cleaning materials. The best way to prevent tarnish is to wear your jewelry often. Just remember not to wear it in chlorinated water or when working with household cleaners.