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Turquoise references on wikipedia
Turquoise
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8ยท4H2O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue. In recent times turquoise, like most other opaque gems, has been devalued by the introduction of treatments, imitations, and synthetics onto the market, some difficult to detect even by experts.
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8ยท4H2O. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue. In recent times turquoise, like most other opaque gems, has been devalued by the introduction of treatments, imitations, and synthetics onto the market, some difficult to detect even by experts.
| Description | |||
 Answers.com | Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, and encyclopedias | ||
| Arizona.edu | The University of Arizona, Tucson Arizona | ||
| Blackwell-synergy.com | 302 Found | ||
| Cmich.edu | - Central Michigan University | ||
| Dharamsalanet.com | Dharamsala Information Resource - The DharamsalaNet | ||
| Doi.org | The Digital Object Identifier System | ||
| Element51.com | INDEX PAGE | ||
| Firoozeh-iran.com | ..:: Persian Turquoise - The First Professional Web Site About PersianTurquoise ::.. | ||
| Geocities.com | Yahoo! GeoCities: Get a web site with easy-to-use site building tools. | ||
| Mindat.org | Mineralogy Database - Mineral Collecting, Localities, Mineral Photos and Data | ||
| Nga.gov | National Gallery of Art | ||
| Ort.org | World ORT education charity supporting Jewish and International causes. Online donations., ORTnet 2008 | ||
| Persian-turquoise.ir | Persian-turquoise.ir | ||
| Thebritishmuseum.ac.uk | British Museum - Welcome to the British Museum | ||
| Usgs.gov | Welcome to the USGS - U.S. Geological Survey | ||
