Umangite

Infobox mineral
name = Umangite
category = Selenide mineral
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formula = Cu₃Se₂
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references = [ [http://webmineral.com/data/ Index of /data ] ] [ [http://www.mindat.org/ Mineralogy Database - Mineral Collecting, Localities, Mineral Photos and Data ] ]

Umangite is a copper selenide mineral, Cu₃Se₂, discovered in 1891. It occurs only in small grains or fine granular aggregates with other copper minerals of the sulfide group. It has a hardness of 3. It is blue-black to red-violet in color with a black streak. It has a metallic luster.

Umangite is named after the locality of Sierra de Umango, La Rioja province in Argentina. It also occurs at other localities including the Harz Mountains in Germany, and at Skrickerum, Sweden.

ee also

*List of minerals

References

* [http://webmineral.com/data/Umangite.shtml Webmineral data]
* [http://www.mindat.org/min-4090.html Mindat.org]