Silver was discovered around 4000 BC. At that time, silver was used both as currency as well as a thing of adornment. In 2000 BC, mining for silver began with the extraction of lead ore with silver in it. In 500 BC, a large mine was discovered near Athens - this mine enabled the city to grow rich and powerful. Nowadays, silver is still valued. When it gets tarnished, you can clean it with supplies found around the house.