Sugilite
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[[Image:Sugolite Gemstone Tile.jpg|thumb|Sugilite tile]]
[[Image:Sugilith.jpg|thumb|right|180px|Sugilite]]
[[Image:Sugilith geschliffen.jpg|thumb|right|180px|Sugilite]]
'''Sugilite''' (also known as '''luvulite''') is a relatively rare pink to purple [[Silicate minerals|cyclosilicate]] mineral with the complex chemical formula: [[potassium|K]][[sodium|Na]]<sub>2</sub>([[iron|Fe]],[[manganese|Mn]],[[aluminum|Al]])<sub>2</sub>[[lithium|Li]]<sub>3</sub>[[silicon|Si]]<sub>12</sub>[[oxygen|O]]<sub>30</sub>. Sugilite crystallizes in the [[Hexagonal (crystal system)|hexagonal]] system with prismatic crystals. The crystals are rarely found and the form is usually massive. It has a [[Mohs hardness]] of 5.5 to 6.5 and a [[specific gravity]] of 2.75 - 2.80.
Sugilite was first described in 1944 by the [[Japanese people|Japanese]] [[petrologist]] Ken-ichi Sugi (1901-1948) for an occurrence on Iwagi Islet, [[Japan]] where it is found in an [[aegirine]] [[syenite]] [[intrusive]] stock.
It is found in a similar environment at [[Mont Saint-Hilaire]], [[Quebec]], [[Canada]]. In the Wessels mine in northern [[Cape Province]] of [[South Africa]] sugilite is mined from a [[stratum|strata-bound]] [[manganese]] deposit. It is also reported from [[Liguria]] and [[Tuscany]], [[Italy]]; [[New South Wales]], [[Australia]]; and [[Madhya Pradesh]], [[India]].
==See also==
*[[List of minerals]]
*[[List of minerals named after people]]
==References==
{{commonscat|Sugilite}}
*[http://webmineral.com/data/Sugilite.shtml Webmineral]
*[http://www.mindat.org/min-3822.html Mindat w/ locations]
*[http://www.cst.cmich.edu/users/dietr1rv/sugilite.htm R. V. Dietrich]
*[http://mineral.galleries.com/minerals/silicate/sugilite/sugilite.htm Mineral galleries]
*[http://www.minsocam.org/msa/Handbook/Sugilite.PDF MSA Handbook PDF]
{{mineral-stub}}
{{Manganese minerals}}
[[Category:Potassium minerals]]
[[Category:Sodium minerals]]
[[Category:Iron minerals]]
[[Category:Manganese minerals]]
[[Category:Aluminium minerals]]
[[Category:Lithium minerals]]
[[Category:Silicate minerals]]
[[Category:Gemstones]]
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