Latitude: 29°25'S
Longitude: 25°1'E
A diamond mine in a kimberlite pipe, that was discovered in 1870. It was first worked by diggers, but soon became to deep to mine by manual means. It was then purchased by Alfred Mosley, who formed a company that worked the deposit until 1891, when the mine was bought by De Beers. The mine was closed in 1931, but re-opened in 1971 to replace Jagersfontein Mine. It closed again in 1982, was again re-opened in 1986 and closed again in 2005. Meanwhile, the mine has been sold to Petra Diamonds.
Although the deposit produced diamonds of exceptional quality, the diamond grade was too low to sustain the mine in times of a weak diamond market.
References
- Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Some Aspects of the Mineralogy and Petrology of Ultramafic Xenoliths in Kimberlite. Contributions to Mineralogy and Petrology 26, 75-123.
- Mining Annual Review (1985): 147.
- Izraeli, E.S., Harris, J.W., and Navon, O. (2004): Fluid and mineral inclusions in cloudy diamonds from Koffiefontein, South Africa. Geochmica et Cosmochimica Acta: 68: 2561-2575.
- Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Kimberlite-hosted diamond deposits of southern Africa: A review. Ore Geology Reviews 34, 33-75.
Mineral List
5 entries listed. 1 valid mineral.
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