Persian turquoise came from a number of mines in modern day Iran. The stones from all mines show a great color variation. Many mines were worked around Nishapur, 225 miles east of the southern end of the Caspian Sea, close to old caravan routes.

Firm evidence exists that these mines were heavily worked beginning in the 10^th century, but there is also evidence that some of the mines near the surface may have been exploited as early as 2100 B.C.

The stones that are valued the most in Persia are the stones that completely lack matrix of any kind and that have a bright blue color. The oldest known piece of jewelry, a turquoise bracelet made with Persian turquoise, was found on the mummified wrist of ancient Egyptian Queen Nor.

The Persian turquoise sold by Silver Sun comes from an old mine on the corner of Armenia, Azerbijan and Iran.