Turquoise is usually found sandstone layers and can be seen as splotches or as a network of brown or black veins running through the sandstone.  There are many small-scale mining operations that are worked by hand.  Only one mine in Apache Canyon California operates at a commercial capacity today.

Turquoise is possibly the most valuable, non-transparent mineral used in jewelry.  It has been mined since at least 6000 BC by Egyptians.  Like other opaque such as coral, turquoise is commonly sold by the size in millimeters rather than by weight.

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Jewelry Casting
requires specific Jewelry Making Supplies and Jewelry Tools. Learn about
Jewelry Casting Here.

Casting
Jewelry is an ancient skill that has been around for as long as there has been
jewelry in the world. The Ancient Egyptians are usually credited with
perfecting the process but casting jewelry was also practiced by meso American
societies and cultures located in Asia and the Middle East.
The casting process is called Lost-wax and is still very popular with craftsmen
who enjoy making hand made jewelry.

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