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Roberts Victor Mine, Boshof, Free State Province, South Africa

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A diamond mine in a kimberlite deposit consisting of two dykes, one of which is associated with two pipes. The diamond grades and qualities of the different kimberlite bodies varied considerably. In general, diamonds from the pipes were of poorer quality than those from the dykes. Some parts of the latter contained diamonds of exceptional quality. The mine was considered marginal, and the underground portion was closed following a major accident in the 1990s. In recent years some re-treatment of tailings dumps has taken place, but this has now also ceased.
Located about 40 km east of Boshof.



References:
- Dana 6:A2:34.
- 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.
- 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:
  		•  'Albite-Anorthite Series'
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Analcime
    Na
     
    2
    		[Al
     
    2
    		Si
     
    4
    		O
     
    12
    		] · 2H
     
    2
    		O
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Augite
    (Ca,Na)(Mg,Fe
    2+
     
    		,Al,Fe
    3+
     
    		,Ti)[(Si,Al)
     
    2
    		O
     
    6
    		]
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Augite
    var: Fassaite
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Calcite
    CaCO
     
    3
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Chromite
    FeCr
     
    2
    		O
     
    4
    Reference: [Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.]
  		•  Coesite
    SiO
     
    2
    Reference: [Am Min 62:828-830 ]
  		•  Corundum
    Al
     
    2
    		O
     
    3
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Diamond
    C
    Reference: [Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.]
  		•  Diopside
    CaMg[Si
     
    2
    		O
     
    6
    		]
    Reference: [Field, M., Stiefenhofer, J., Robey, J., and Kurszlaukis, S. (2008): Ore Geology Reviews 34, 33-75.]
  		•  'Glass'
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Graphite
    C
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Grossular
    Ca
     
    3
    		Al
     
    2
    		[SiO
     
    4
    		]
     
    3
    Reference: [Tony Peterson specimen]
    Site Photo
    Roberts Victor Mine, Boshof, Free State Province, South Africa
    © Tony Peterson
  		•  'Hornblende'
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Kyanite
    Al
     
    2
    		[O|SiO
     
    4
    		]
    Reference: [Dana 6:A2:34.]
  		•  Mullite
    Al
     
    8
    		[(O,OH,F)|(Si,Al)O
     
    4
    		]
     
    4
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]
  		•  Omphacite
    (Ca,Na)(Mg,Al)[Si
     
    2
    		O
     
    6
    		]
    Reference: [Am Min 62:828-830 ]
  		•  Quartz
    SiO
     
    2
    Reference: [Am Min 62:828-830 ]
  		•  Sanidine
    K[AlSi
     
    3
    		O
     
    8
    		]
    Reference: [Am Min 62:828-830 ]
  		•  Spinel
    MgAl
     
    2
    		O
     
    4
    Reference: [Mathias, M., Siebert, J.C., and Rickwood, P.C. (1970): Contributions to Mineralogy and Petrology 26, 75-123.]


    20 entries listed. 16 valid minerals.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in South Africa Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 6th Nov 2009 22:25:40