Compare Minerals

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

Mineral A

Mineral B

Bernalite

Name

—

Fe(OH)₃

Formula

—

Mineral Species

Entry type

—

Oxides & Hydroxides

Chemical class

—

Orthorhombic

Crystal system

—

Mohs hardness

—

3.32

Specific gravity

—

Apple-green

Streak

—

Vitreous to adamantine when fresh; resinous on crystal surfaces

Luster

—

None

Cleavage

—

Immm

Space group

—

Perovskite

Structural group

—

Bnl · Approved

IMA

—

1991

Named in

—

Dark bottle-green to yellow-green; in thin section, yellowish bottle-green

Typical colors

—

Fe · O · H

Elements

—