Calcite (Kalahari Manganese Fields, South Africa)
N'Chwaning 2 Mine, Kalahari manganese Fields, South Africa. 60mm x 35mm.
A interesting specimen, the "brown" calcites are covering the manganese matrix with the odd clear rhombehedral calcite scattered over them. A unusual piece from the Kalahari Manganese Fields. Packed shipping weight +/- 120gr.