Minerals identify

Know how to recognize them

Manganite

Oxide mineral

Manganite is a mineral oxide, MnO(OH), crystallizing in the monoclinic Crystals of manganite are prismatic and deeply striated parallel to their length; they are often grouped together in bundles. The color is dark steel-grey to iron-black, and the luster brilliant and submetallic. The streak is dark reddish brown. The hardness is 4, and the specific gravity is 4.3. There is a perfect cleavage parallel to the brachypinacoid, and less-perfect cleavage parallel to the prism faces. Twinned crystals are not infrequent.

The mineral contains 89.7% manganese sesquioxide; it dissolves in hydrochloric acid with evolution of chlorine.

Identification

Color of mineral

Grey
Black
Red
Brown
White

Mohs scale ( mineral hardness )

4

The streak

Brown
Black

Density ( specific gravity )

2.25
2.25
2.53

Luster ( interacts light )

Metallic

Crystal ( diaphaneity )

Monoclinic