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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(Na,Ca)₂₊ₓ(V⁵⁺,V⁴⁺)₆O₁₆·4H₂O

Formula

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Mineral Species

Entry type

—

Oxides & Hydroxides

Chemical class

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Monoclinic

Crystal system

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Mohs hardness

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Specific gravity

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Olive-green to brownish green

Streak

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Silky or pearly to subadamantine

Luster

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Cleavage

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Space group

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Hewettite

Structural group

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Gs · Approved

IMA

—

1964

Named in

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Dark olive-green to greenish black; shades of green and brown in transmitted light

Typical colors

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Na · Ca · V · O · H

Elements

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