en.wikipedia.org/wiki/Turquoise

Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of copper and ..... The mother rock or matrix in which turquoise is found can often be seen as splotches or a network of brown or black veins running through the stone  ...

www.minerals.net/mineral/turquoise.aspx

Turquoise is an antique ornamental stone, highly regarded for its unique and striking namesake .... Recommended Books on Rocks, Minerals, and Gemstones  ...

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Explore Gem Rock's collection of verified Turquoise at wholesale prices in a variety of colors and sizes. Buy loose Turquoise now or place a bid on your favorite ...

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Items 1 - 12 of 93 ... Its unique shade of blue, often blue-green, lends it name, Turquoise, to all things of this tranquil hue. The delicate veining or mottled webbing in ...

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Turquoise. Turquoise is a stone that has been valued by humans for thousands of years. ... It is found in arid climates often forming in cavities of volcanic rocks.

www.gemsociety.org/article/turquoise-jewelry-gem-information

More typically, this stone is found as an opaque deposit in nodules, in veins within host rocks, or as shallow crusts on the surface of rocks. Massive turquoise is ...

www.rockhounds.com/rockgem/articles/turquoise.shtml

Turquoise is one of the world's earliest-used gem materials. ... Turquoise also depends on its host rock to provide two other critical ingredients in addition to the  ...