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

G

Name

—

Fe²⁺Fe³⁺₄(PO₄)₄(OH)₂·2H₂O

Formula

—

Mineral Species

Entry type

—

Phosphates

Chemical class

—

Monoclinic

Crystal system

—

3–4

Mohs hardness

—

3.41

Specific gravity

—

Olive-green

Streak

—

Vitreous to greasy

Luster

—

—

Cleavage

—

Cmmm

Space group

—

—

Structural group

—

Gin · Approved

IMA

—

1977

Named in

—

Dark greenish black to brownish black

Typical colors

—

Fe · P · O · H

Elements

—