We are proud to offer this striking vintage Navajo silver ring having a chunky Kingman turquoise stone surrounded by handcarved silver rope, silver beads and a scalloped silver stem border! This exquisite ring has a graduated handcarved double silver rail band! The center stone measures around 1″inchx15mm The ring face measures around 1″¼x 1? The ring size is around 7 4.5mmband ring Sturdy 11.7 grams. Cir Mid Century no marks but tested as sterling silver great addition to your collection?? Stone hammers found in the Mohave County, northwest of Kingman, AZ prove that Kingman turquoise was first mined by Native Americans as early as 600 a. Today the mine is owned and operated by Colbaugh Processing. Chuck Colbaugh found the artifacts in May of 1962, and Mr. Colbaugh’s grandson, Marty Colbaugh, operates the mine today. This long time mining family also owns Ithaca Peak Turquoise mine, and the Turquoise Mountain mine. Kingman turquoise sets an industry standard for blue matrix turquoise. The mine became famous for its nuggets, which few mines produce. Today, the Kingman turquoise is highly prized and sought after by collectors everywhere, and it’s one of the more easily recognized American Turquoises.