Silver is an important metal in Magic and Alchemy. Silver has long and universal associations with the mysterious and magical powers of the Moon. It appears in nature in a pure state and is an excellent conductor of electromagnetic energy, thus making it a valuable metal. It was prized for its magical properties by the ancient Egyptians and Incas. In folklore silver repels all evil, including spirits and malevolent Spells. In alchemy silver is called Luna or Diana, the Roman goddess of the Moon. In alchemical formulae silver is represented by a crescent moon.