Minerals identify

Know how to recognize them

Janggunite

Oxide mineral

Janggunite is a rare manganese with formula Mn5−x(Mn,Fe)1+xO8(OH)6.

It was first described in 1975 for an occurrence in the Janggun mine, Bonghwa, South Korea

Identification

Color of mineral

Black

Mohs scale ( mineral hardness )

2

The streak

Brown
Black

Luster ( interacts light )

Dull

Crystal ( diaphaneity )

Orthorhombic