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

Gerdtremmelite

Name

—

ZnAl₂(AsO₄)(OH)₅

Formula

—

Mineral Species

Entry type

—

Arsenates

Chemical class

—

Triclinic

Crystal system

—

—

Mohs hardness

—

3.3

Specific gravity

—

White

Streak

—

Adamantine

Luster

—

—

Cleavage

—

—

Space group

—

—

Structural group

—

Gtm · Approved

IMA

—

1983

Named in

—

Brown, yellowish brown, dark brown

Typical colors

—

Zn · Al · As · O · H

Elements

—