DESCRIPTION: This gorgeous ring features a large specimen of natural light blue kingman turquoise with quartz inclusions. The gemstone is secure in sterling silver bezel, with rope design vintage sterling silver. This ring will be a treasured addition to your collection of fine vintage Native American jewelry. MEASUREMENTS: Ring face measures 1½x20mm. RING SIZE: 7.75. WEIGHT: 11.1 grams. No marks but tested as sterling silver Kingman is first of all the name of a town located in the northwest of Arizona, not far from the border with Nevada. On Kingman outskirts, in the Mineral Park District, are located the three mines from which Kingman turquoise is extracted. The Kingman mine (the main one). Kingman turquoise is steeped in history and is considered the oldest American turquoise discovered by man: the Natives of the Southwestern United States are said to have discovered the mine over 1,000 years ago, and this turquoise would have been at the heart of the Native culture’s jewelry designs. It was between the late 1880s and early 1900s that this mining area was exploited and Kingman turquoise was marketed. To this day, this beautiful genuine turquoise with its varied hues is highly prized by Native American jewelers, international collectors and simply lovers of beautiful semi-precious stones! Among the large amount of turquoise that the Mineral Park District produces, high grade natural Kingman turquoise is very rare and appears to represent less than 1% of the mine’s current production. High grade natural Kingman turquoise is therefore very valuable. This type of stone has only been found every 30 years or so while the mine has been in operation.