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Topaz (view source)

Revision as of 21:30, January 2, 2012

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{{Mineral
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|name=Topaz
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|image=Topaz.jpg
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|cdesc=Aluminum silicate fluoride hydroxide
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|formula= Al<sub>2</sub>SiO<sub>4</sub>(F, OH)<sub>3</sub>
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|colors=Colorless, white, pale blue, light green, yellow, yellowish brown, or red
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|streak=White
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|hardness=8
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|cleavage=Perfect (001)
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|fracture=Irregular/Uneven, Sub-Conchoidal
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|sgravity=3.5 - 3.6, Average = 3.55
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|csystem=Orthorhombic
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|chabit=Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
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|enviro=Pegmatites and high temperature quartz veins. Cavities in granites and rhyolites.
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|occur=include Minas Gerias, [[Brazil]]; [[Pakistan]]; San Diego Co, [[California]]; Ural Mountains, [[Russia]]; [[Mexico]] and the Thomas Range, [[Utah]].  
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|nameorigin=Named after Topasos Island in the Red Sea. In antique times, the name was probably used for the gemstone that is now known as [[peridot]].
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}}
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'''Topaz''' is one of the hardest minerals rating an 8 on the [[Mohs Hardness Scale|Mohs hardness scale]].  Chemically, topaz is Aluminum silicate fluoride hydroxide Al<sub>2</sub>SiO<sub>4</sub>(F, OH)<sub>3</sub> and is classified as a [[silicate]].  It is commonly used as a [[gemstone]] and its crystals can grow to a very large size. Topaz is commonly a shade of yellow or orange, but may also be colorless and is found in the [[blue]] and [[green]] ranges. Topaz is the [[birthstone]] for [[November]].
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==Gallery==
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<gallery>
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Image:Topaz2.jpg|'''Topaz sample'''
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</gallery>
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==External Links==
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*[http://mineral.galleries.com/minerals/silicate/topaz/topaz.htm Amethyst Galleries]
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*[http://www.mindat.org/min-3996.html Mindat.org]
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*[http://webmineral.com/data/Topaz.shtml Webmineral]
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[[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]] 16:30, 2 January 2012 (EST)
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[[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]]
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[[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]] 16:30, 2 January 2012 (EST)
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[[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]][[file:Question-Evolution-Campaign.jpg|1000px]] 16:30, 2 January 2012 (EST)'''Topaz''' is one of the hardest minerals rating an 8 on the [[Mohs Hardness Scale|Mohs hardness scale]].  Chemically, topaz is Aluminum silicate fluoride hydroxide Al<sub>2</sub>SiO<sub>4</sub>(F, OH)<sub>3</sub> and is classified as a [[silicate]].  It is commonly used as a gemstone and its crystals can grow to a very large size. Topaz is commonly a shade of yellow or orange, but may also be colorless and is found in the blue and green ranges. Topaz is the birthstone for [[November]].
    
[[Category:Birthstones]]
 
[[Category:Birthstones]]
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[[Category:Minerals]]
 
[[Category:Gems]]
 
[[Category:Gems]]
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