Turquoise Mining Process. Deep in the heart of Nevada - right in the middle of nowhere lies America& 39;s most famous gemstones. The process is harder and more labor intensive than what most people would imagine. Explosives and heavy equipment are used to remove the overburden while tracking veins and pockets of Turquoise but so rewarding when those ...
Turquoise usually forms close to the surface. Turquoise is mined either as a secondary mineral product from large, open-pit copper mining operations, or smaller, often family operated mines where turquoise is the primary mineral product. The main sources of turquoise world-wide are the Southwest United States, China, Tibet, and Nishapur, Persia.
Supergene alteration fractured the rock and converted some of the minerals in the rock to alunite, which freed aluminum and phosphate to combine with copper from oxidized copper sulfides to form turquoise. This process took place at a relatively shallow depth, and by 1965 the mines had & 34;bottomed& 34; at a depth averaging just 9 meters 30 ft below the surface.
Using backhoes or excavators, we dig out the host rock containing turquoise and run it over a screen to seperate the dirt and dust from the rock. The rock all goes into a cement mixer to begin the tumbling process. Depending on the mine, this can take minutes or hours to remove the coating on the turquoise so the stone can be seen.
The Turquoise Mining Process - ArticlesFactory com. STABILIZED TURQUOISE This means that the natural mineral has been altered to harden the stone usually by infusing polystyrene plastic resin into the pore spaces within the stone The stabilization process serves to lock in the color of the stone so it will not change.
How Turquoise is Mined One reason turquoise may have been so prevalent in early Pueblo art is the relative ease with which it can be found. Turquoise deposits can be found in surface rocks and can be separated from the host rock with hand tools. Many deposits lead to larger veins that run deeper underground and/or in mountainsides.
Most of the turquoise mined in the United States is a byproduct of copper production. The large open-pit copper mines excavate down through the shallow rock units where the turquoise is formed.
Kingman turquoise Mine stones are processed, sorted, graded and distributed by Marty Colbaugh’s 20 or so employees. Most turquoise is porous and must be processed for use in jewelry. About three percent of the stones pulled from the Kingman Turquoise Mine are naturally hard enough to be used unprocessed.