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

Ludwigite

Name

—

Mg₂Fe³⁺O₂(BO₃)

Formula

—

Mineral Species

Entry type

—

Borates

Chemical class

—

Orthorhombic

Crystal system

—

5

Mohs hardness

—

3.8

Specific gravity

—

Black to greenish black

Streak

—

Submetallic. Streak: Black to greenish black. Luster: Silky

Luster

—

—

Cleavage

—

Pbam

Space group

—

Ludwigite

Structural group

—

Ldw · Grandfathered

IMA

—

1874

Named in

—

Black, Green

Typical colors

—

Mg · Fe · O · B

Elements

—