Violarite

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Violarite specimen - rock identification

What is Violarite?

Violarite (FeNi2S4) is a supergene sulfide mineral associated with the weathering and oxidation of primary pentlandite nickel sulfide ore minerals. Violarite crystallises in the isometric system, with a hardness of 4.5 to 5.5 and a specific gravity of about 4, is dark violet grey to copper-red, often with verdigris and patina from associated copper and arsenic sulfides, and is typically in amorphous to massive infill of lower saprolite ultramafic lithologies. Violarite has a characteristic violet colour, hence the name from the Latin 'violaris' alluding to its colour especially when viewed in polished section under a microscope.

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Violarite Localities Map

See where Violarite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

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Key Characteristics

Formation of Violarite

Violarite is reported widely from the oxidised regolith above primary nickel sulfide ore systems worldwide. It is of particular note from the Mount Keith dunite body, Western Australia, where it forms an important ore mineral. It is also reported from open cast mines around the Kambalda Dome, and Widgiemooltha Dome, in association with polydymite, gaspeite, widgiemoolthalite and hellyerite, among other supergene nickel minerals.

Quick Facts

Physical Properties

Color
Violet gray, copper red, light gray, or steel gray
Hardness (Mohs)
4.5 - 5.5
Streak
Black

Chemical Properties

Chemical Formula
Fe2+Ni3+2S4
Elements
Fe, Ni, S
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