Turquoise is an opaque, blue-to-green color derived from a mineral that is a hydrous phosphate of copper and aluminum. The mineral is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue.

How is turquoise blue?

Turquoise in its purest form is a hydrous phosphate compound of aluminum and copper, which creates the medium blue color we all know. Persian and Egyptian collectors prefer this medium blue color. Many say that this color is the most valuable because it is the purest, only having traces of copper or aluminum.

Where does blue turquoise come from?

"The most common places known for good quality turquoise are Iran (Persia), Egypt, Northwest China, Mexico and the southwestern part of the United States. Although there can be mines found in many states, Colorado, New Mexico, Arizona and Nevada are the most common places where you will find them.