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South Africa | |
- John Taolo Gaetsewe District Municipality
- Joe Morolong Local Municipality
| Mineralogical Record (2001) 32:252 |
| Cairncross B., Tsikos H. & Harris C. (2000) Prehnite from the Kalahari Mn field, South Africa, and its possible implications. South African Journal of Geology 103, 231-236. |
- Namakwa District Municipality
- Hantam Local Municipality
| Cole, D. I. (2013) The Metallogeny Of The Calvinia Area. Council for Geoscience, South Africa |
| Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, Linden . |
- Nama Khoi Local Municipality
| Joubert, G. K. (1937): The pegmatite area south of the Orange River, Namaqualand. Mem. Geol. Survey, S. Africa, No. 31, 172 pp. Gevers, T. W. Partridge, F. C. |
| Cairncross, Bruce (2004) History of the Okiep Copper District, Namaqualand, Northern Cape Province, South Africa. The Mineralogical Record, 35 (4) 289-317 |
| Yale Collection - mindat photo ID 274698 |
| Cairncross, Bruce (2004) History of the Okiep Copper District, Namaqualand, Northern Cape Province, South Africa. The Mineralogical Record, 35 (4) 289-317 |
N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa