Compare Minerals

Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.

Mineral A

Mineral B

Name

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(Ni,Co)₃₀(As₂O₇)₁₅

Formula

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Mineral Species

Entry type

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Arsenates

Chemical class

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Monoclinic

Crystal system

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Mohs hardness

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4.904

Specific gravity

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Pale reddish brown to purplish brown

Streak

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Vitreous. Megascopically indistinguishable from brownish purple xanthiosite. R = (470) 9.59, (546) 9.32, (589) 9.27

Luster

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None

Cleavage

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Space group

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Structural group

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Pwi · Approved

IMA

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2002

Named in

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Dark violet-red to dark brownish red

Typical colors

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Ni · Co · As · O

Elements

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