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New page: '''Turquoise''' is a mineral used as a gemstone in jewelry. It has a distinctive greenish-blue color with some lighter and darker variations. It was used long ago by the Egyptians and ...
'''Turquoise''' is a [[mineral]] used as a gemstone in jewelry. It has a distinctive greenish-blue color with some lighter and darker variations. It was used long ago by the Egyptians and the Aztecs, who believed turquoise had protective powers, and it is found in [[Native American]] jewelry.
It is a copper aluminum [[phosphate]] with the chemical composition: CuAl<sub>6</sub>(PO<sub>4</sub>)<sub>4</sub>(OH)<sub>8</sub>·4H<sub>2</sub>O. It has a [[hardness]] rating of 5 - 6 on the [[Mohs Hardness Scale|Mohs scale]], and a specific Gravity of around 2.6 - 2.8.
Turquoise is the [[birthstone]] for [[December]]
==References==
*http://www.gemstone.org/gem-by-gem/english/turquoise.html
*http://www.galleries.com/minerals/phosphat/turquois/turquois.htm
*http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/turquoise.html
[[Category:Birthstones]]
[[Category:Gems]]
[[Category:Minerals]]
It is a copper aluminum [[phosphate]] with the chemical composition: CuAl<sub>6</sub>(PO<sub>4</sub>)<sub>4</sub>(OH)<sub>8</sub>·4H<sub>2</sub>O. It has a [[hardness]] rating of 5 - 6 on the [[Mohs Hardness Scale|Mohs scale]], and a specific Gravity of around 2.6 - 2.8.
Turquoise is the [[birthstone]] for [[December]]
==References==
*http://www.gemstone.org/gem-by-gem/english/turquoise.html
*http://www.galleries.com/minerals/phosphat/turquois/turquois.htm
*http://minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/turquoise.html
[[Category:Birthstones]]
[[Category:Gems]]
[[Category:Minerals]]