Castle Dome turquoise, which has also been known as Pinto Valley, is a by-product of a copper mine located five miles west of Miami, Arizona. Much of Arizona turquoise comes from the copper mining operations, which are often continuations of old turquoise mines. The Castle Dome mine was originally opened in 1943 and developed by the owners as a war project. With the end of War World II and a low demand for copper the mine closed in 1953.
Wt. 5.5 ct 16.8 mm x 8.3 mm x 4.3 mm Price Per/ct. 6.00 Nice bright blue