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Compare Minerals

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

Mineral A

VS

Mineral B

Vonsenite

Name

—

Fe²⁺₂Fe³⁺O₂(BO₃)

Formula

—

Mineral Species

Entry type

—

Borates

Chemical class

—

Orthorhombic

Crystal system

—

5

Mohs hardness

—

4.21

Specific gravity

—

Brownish black

Streak

—

Metallic to submetallic, silky if fibrous

Luster

—

—

Cleavage

—

Pbam

Space group

—

Ludwigite

Structural group

—

Von · Grandfathered

IMA

—

1920

Named in

—

Coal-black to greenish black

Typical colors

—

Fe · O · B

Elements

—