The open encyclopedia of minerals

Glossary Cite the database

Mineralogist.org

Minerals A–Z Search Collections Browse by Property Identify a Specimen Compare Minerals Localities Map Glossary Contribute Search the Database →

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

Erlianite

Name

—

Fe²⁺₄Fe³⁺₂Si₆O₁₅(OH)₈

Formula

—

Mineral Species

Entry type

—

Silicates

Chemical class

—

Orthorhombic

Crystal system

—

3.7

Mohs hardness

—

3.11

Specific gravity

—

Brownish black

Streak

—

Silky

Luster

—

Perfect on {001} and {100}

Cleavage

—

—

Space group

—

—

Structural group

—

Ern · Approved

IMA

—

1985

Named in

—

Black; brown in thin section

Typical colors

—

Fe · Si · O · H

Elements

—