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Bisbee turquoise, also known as Bisbee Blue, is amongst the finest turquoise found anywhere in the world. [2] Mining operations in the pit ended in 1974. The undeveloped Cochise deposit, located immediately north of the Lavender pit, contains an estimated 190 million tons of rock containing 0.4% acid-soluble copper, [ 3 ] which may be mined in ...
Bisbee Blue or Bisbee turquoise refers to the turquoise that comes from copper mines located in the vicinity of Bisbee, Arizona. Bisbee turquoise can be found in many different shades of color and quality, from soft, low quality pale blue, to the quality hard brilliant blue turquoise and almost every shade of blue in between.
Cabochons are smooth, often domed, with flat backs. [1] Agates and turquoise are usually cut this way, but precious stones such as rubies , emeralds and sapphires may also be. [ 2 ] [ 3 ] [ 4 ] Many stones like star sapphires and moonstones must be cut this way in order to properly display their unusual appearance.
Bisbee Blue – Turquoise from copper mines near Bisbee, Arizona, with a deep blue color; Lapis lazuli – Metamorphic rock containing lazurite, prized for its intense blue color, with a deep blue color; Lazurite – Alumino-silicate mineral whose blue colour is due to a sulfide species and not copper, with a deep blue color; List of minerals
In its days of production, (late 19th century – early 20th century) it was the richest copper deposit ever discovered, causing the accompanying town of Bisbee, Arizona to prosper. Under this part of the Mule Mountains are many mining tunnels dug in pursuit of the rich copper ore. Today, Bisbee (also known as the "mile-high city," at elevation ...
Bisbee, looking east, 1909 Bisbee was founded as a copper, gold, and silver mining town; topographical map from 1902. Bisbee was founded as a copper, gold, and silver mining town in 1880, and named in honor of Judge DeWitt Bisbee, one of the financial backers of the adjacent Copper Queen Mine. The town was the site of the Bisbee Riot in 1919.