Minerals identify

Know how to recognize them

Pyrolusite

Oxide mineral

Pyrolusite is a mineral consisting essentially of manganese dioxide 2) and is important as an ore It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts. It has a metallic luster , a black or bluish-black streak, and readily soils the fingers. The specific gravity is about 4.8. Its name is from the Greek for fire and to wash, in reference to its use as a way to remove tints from glass.

Identification

Color of mineral

Grey
Black

Mohs scale ( mineral hardness )

6

The streak

Black

Luster ( interacts light )

Metallic
Dull

Crystal ( diaphaneity )

Tetragonal