Home > Kalahari Manganese Field – March 18 > MS0898 Braunite

Braunite - Sold

Braunite is a manganese oxide silicate mineral with tetragonal symmetry. Haidinger (1828) named the mineral after Kammerrath Braun of Gotha, Germany. Moore & Araki (1976) studied braunite, confirmed its tetragonal symmetry, and detailed its relationship with bixbyite. This specimen features pyramidal black crystals to 7 mm, interspersed within massive calcite. Etching of the calcite may reveal more fine braunite crystals, but its presence does provide some contrast.