Bismutite from Namakwa District Municipality, Northern Cape, South Africa
South Africa | |
| Cairncross, B., Dixon, R. (1995) Minerals of South Africa. Geological Society of South Africa, Linden . Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 61 |
| P. G. Sonhnge (1950) The Nababeep Near West Tungsten Mine, South Africa. American Mineralogist 35:931-940 |