Minerals identify

Know how to recognize them

Braunite

Nesosilicates

Braunite is a silicate mineral containing both di- and tri-valent with the chemical formula Common impurities include iron, calcium, boron, barium, titanium, aluminium, and magnesium.

Braunite forms grey/black tetragonal crystals and has a Mohs hardness of 6 - 6.5.

It was named after the Wilhelm von Braun (1790–1872) of Gotha

A calcium iron bearing variant, named braunite II (formula: Ca(Mn3+,Fe3+)14SiO24), was discovered and described in 1967 from Kalahari, Cape Province, South Africa

Identification

Color of mineral

Brown
Black
Grey

Mohs scale ( mineral hardness )

6

The streak

Black

Luster ( interacts light )

Metallic

Crystal ( diaphaneity )

Tetragonal