Minerals identify

Know how to recognize them

Cornwallite

Arsenate mineral

Cornwallite is an uncommon copper arsenate mineral with formula Cu5(AsO4)2(OH)4. It forms a series with the phosphate and is a dimorph. It is a green monoclinic mineral which forms as radial to fibrous encrustations.

Identification

Color of mineral

Green
Black

Mohs scale ( mineral hardness )

4.5

The streak

Green

Density ( specific gravity )

1.81
1.815
1.85

Luster ( interacts light )

Vitreous
Resinous
Waxy

Crystal ( diaphaneity )

Monoclinic