Opal from Kalahari manganese field, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
South Africa | |
| Am Min 53:495 |
| Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) pp 289. |
South Africa | |
| Am Min 53:495 |
| Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) pp 289. |