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'''Sugilite''' ({{IPAc-en|ˈ|s|uː|ɡ|ᵻ|l|aɪ|t}} {{respell|SOO|gi-lyt}}) 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]], [[aluminium|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 to 2.80. It is mostly translucent.
'''Sugilite''' ({{IPAc-en|ˈ|s|uː|ɡ|ᵻ|l|aɪ|t}} {{respell|SOO|gi-lyt}}) 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]], [[aluminium|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 to 2.80. It is mostly translucent.


Sugilite was first described in 1944 by the [[Japanese people|Japanese]] [[petrologist]] [[Ken-ichi Sugi]] (1901&ndash;1948) for an occurrence on Iwagihello
Sugilite was first described in 1944 by the [[Japanese people|Japanese]] [[petrologist]] [[Ken-ichi Sugi]] (1901&nda
Follow my instash;1948) for an occurrence on Iwagihello
Islet, [[Japan]], where it is found in an [[aegirine]] [[syenite]] [[Intrusive rock|intrusive]] [[stock (geology)|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]].
Islet, [[Japan]], where it is found in an [[aegirine]] [[syenite]] [[Intrusive rock|intrusive]] [[stock (geology)|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]].


Revision as of 13:22, 10 January 2019

Original Manganoan Sugilite "GEL" Smithsonian Exhibit History

Sugilite (/ˈsuːɡɪlaɪt/ SOO-gi-lyt) is a relatively rare pink to purple cyclosilicate mineral with the complex chemical formula KNa2(Fe, Mn, Al)2Li3Si12O30. Sugilite crystallizes in the 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 to 2.80. It is mostly translucent.

Sugilite was first described in 1944 by the Japanese petrologist Ken-ichi Sugi (1901&nda



Follow my instash;1948) for an occurrence on Iwagihello 

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 strata-bound manganese deposit.  It is also reported from Liguria and Tuscany, Italy; New South Wales, Australia and Madhya Pradesh, India.

Note: The mineral is commonly pronounced with a soft "g", as in "ginger". However, as with most minerals, its pronunciation is intended to be the same as the person it is named after; in this case, the Japanese name Sugi has a hard "g", as in "geese".[1]

Purple sugilite on a matrix of baryte crystals, Wessels Mine in Northern Cape Province, South Africa, size: 2.4 x 2.1 x 1.2 cm

See also

References

  1. ^ "OpenLearn Live: 8th September 2015 - Meet The Minerals". OpenLearn. The Open University. Retrieved 20 January 2016.
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