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Line 1: + + + + + + + + + + + + + + + + + + + + + + + + + + + + − [[Category:Minerals]]
added Image:Topaz.jpg, template, gallery, External Links
{{Mineral
|name=Topaz
|image=Topaz.jpg
|cdesc=Aluminum silicate fluoride hydroxide
|formula= Al<sub>2</sub>[(F,OH)<sub>2</sub>|SiO<sub>4</sub>]
|colors=Colorless, white, pale blue, light green, yellow, yellowish brown, or red
|streak=White
|hardness=8
|cleavage=Perfect (001)
|fracture=Irregular/Uneven, Sub-Conchoidal
|sgravity=3.5 - 3.6, Average = 3.55
|csystem=Orthorhombic
|chabit=Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
|enviro=Pegmatites and high temperature quartz veins. Cavities in granites and rhyolites.
|occur=include Minas Gerias, [[Brazil]]; [[Pakistan]]; San Diego Co, [[California]]; Ural Mountains, [[Russia]]; [[Mexico]] and the Thomas Range, [[Utah]].
|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.
}}
'''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]].
'''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]].
==Gallery==
<gallery>
Image:Topaz2.jpg|'''Topaz sample'''
</gallery>
==External Links==
*[http://mineral.galleries.com/minerals/silicate/topaz/topaz.htm Amethyst Galleries]
*[http://www.mindat.org/min-3996.html Mindat.org]
*[http://webmineral.com/data/Topaz.shtml Webmineral]
[[Category:Birthstones]]
[[Category:Birthstones]]
[[Category:Gems]]
[[Category:Gems]]