Allactite

Arsenate mineral

Allactite is a rare arsenate mineral of metamorphosed ore deposits. It is found in Sweden and New Jersey, US. Its name originated from Greek αλλάκτειν (allaktein) meaning "to change", referring to the strong pleochroism

Identification

Color of mineral

Brown

Red

White

Mohs scale ( mineral hardness )

4.5

The streak

Brown

Density ( specific gravity )

1.755

1.772

1.774

Luster ( interacts light )

Vitreous

Greasy

Crystal ( diaphaneity )

Monoclinic