Turquoise is a soft, opaque gemstone that takes a good polish and is admired for its beautiful sky blue color. The blue color is due to the presence of copper, and the green tones come from iron. Turquoise sometimes has a rock matrix and varying shades of gray, brown, or black veining due to inclusions or oxide stains.
Turquoise is one of the first gems ever used for jewelry. Turquoise jewelry was found with a 7500 year-old Egyptian mummy. Turquoise bead from the Mesopotamia (Iraq) date back to 5000 B.C. Turquoise mining in the Americas started about 1000 years ago; this treasured gem has been discovered in burial sites from Argentina to the southwestern United States.
This stone is said to shield the wearer from harmful influences, and help attract friendships. Some cultures use turquoise in meditation.