Description

Aggregate of hausmannite crystals on gangue, named after Jean-Frédéric-Louis Hausmann, German mineralogist (1782-1859).
The pseudo-octahedral crystals are shiny black, with a beautiful metallic luster.
Hausmannite is a manganese oxide with worldwide occurrences.
This specimen comes from the Wessels mine in South Africa, and is part of the large collection of Belgian chemist René Hubin.
Video of this Hausmannite from the Wessels mine in Hotazel, South Africa:

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