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N'Chwaning 2 Mine, Kalahari Manganese Fields, South Africa. 40mm x 40mm.
N'Chwaning 2 Mine, Kalahari Manganese Fields, South Africa. 65mm x 30mm.
Natal, South Africa. 55mm x 35mm.
N'Chwaning 2 Mine, Kalahari Manganese Fields, South Africa. 25mm x 20mm.
Erongo, Namibia. 55mm x 55mm.
Erongo, Namibia. 75mm x 50mm.