I custom cut this cabochon out of genuine turquoise from the Kingman mine in Arizona. It has been stabilized but it has not been color treated. Dimensions are in the listing title in millimeters. I bought a little over a pound of this turquoise as rough from a very reputable dealer at the trade shows in Tucson. Check out the rest of my listings for more focal beads and cabochons in several varieties of turquoise as well as other gemstones.