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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Hg₃(CO₃)(OH)·2H₂O

Formula

—

Mineral Species

Entry type

—

Carbonates

Chemical class

—

Orthorhombic

Crystal system

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Mohs hardness

—

7.14

Specific gravity

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Dark brownish black

Streak

—

Submetallic to adamantine

Luster

—

Cleavage

—

Pcab

Space group

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Structural group

—

Pby · Approved

IMA

—

1993

Named in

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Black to dark red-brown; in polished section, gray with slight blue tinge

Typical colors

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Hg · C · O · H

Elements

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