Turquoise

Turquoise is a phosphate of aluminum with copper and traces of iron. Depending on its origin, the stone can be sky blue to green depending on the amount of copper (which makes it blue) and iron (which makes it green).
Turquoise has long been associated with gods and goddesses in cultures spanning the globe–in ancient Egypt, Persia, China and the Americas. To the Egyptians, the stone was seen as a symbol of rebirth. The Sun God Ra’s hair was said to be made from the stone. The Aztecs offered a death skull inlaid with turquoise to their serpent god of the sun, Quetztalcoatl. Many North American Indian tribes viewed the stone as a male stone of power and the Apaches believed that it could be found in the damp ground at the end of the rainbow.