Specimen of ± 6.5 x 4.5 cm, with hexagonal Sturmanite crystals of ± 1 cm, some twinned, very well defined and bright. The rock is covered with small crystals of Hausmanite with a shiny metallic color.
N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape, South Africa
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