Silver

silver:

Silver is a metallic element with the chemical symbol Ag and the atomic number 47.

Sterling silver is an alloy of 92.5% silver and 7.5% other metals, usually copper. It is often stamped with the numbers 925. In order for something to be considered silver, it must be at least 90% silver and 10% of another metal. This alloy is stamped with 900. Fine silver (99.9% silver) is far too soft for jewelry, but can often be used as a decorative element in silver pieces.

It is much less expensive than gold, but used just as frequently in making jewelry. 

Silver often symbolizes purity, clarity, awareness, focus and persistence. It is also associated with the moon and female energy.