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Causes of the purple and pink colours of manganoan sugilites from the Wessels Mine, South Africa

Published online by Cambridge University Press:  05 July 2018

Emmanuel Fritsch  and
James E. Shigley
Emmanuel Fritsch
Affiliation:
GIA Research, Gemological Institute of America, 1660 Stewart Street, Santa Monica, California 90404-4088, USA
James E. Shigley
Affiliation:
GIA Research, Gemological Institute of America, 1660 Stewart Street, Santa Monica, California 90404-4088, USA
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Abstract

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Keywords

sugilitemanganesecolourWessels mineSouth Africa
Type
Short Communications
Information
Mineralogical Magazine , Volume 58 , Issue 393 , December 1994 , pp. 681 - 685
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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References

Armbruster, T. and Oberhansli, R. (1988) Crystal chemistry of double-ring silicates: structures of sugilite and brannockite. Amer. Mineral., 73, 595–600.Google Scholar
Cabella, R., Lucchetti, G. and Palenzona, A. (1990) Al-rich, Fe-poor manganoan sugilite in a pecto-lite-bearing assemblage from Cerchiara Mine (Northern Apennines, Italy) Neues Jahrb. Mineral. Mh., 443-8.Google Scholar
de Villiers, J. E. (1983) The manganese deposits of Griqualand West, South Africa: some mineralogic aspects. Econ. GeoL, 78, 1108–18.CrossRefGoogle Scholar
Dixon, R. D. (1985) Sugilite and Associated Metamorphic Silicate Minerals from Wessels Mine, Kalahari Manganese Field. M.Sc. Thesis (unpublished), University of Cape Town, 150 pp.Google Scholar
Dunn, P. J., Brummer, J. J. and Belsky, H. (1980) Sugilite, a second occurrence: Wessels Mine, Kalahari Manganese Field, Republic of South Africa. Can. Mineral., 18, 37–9.Google Scholar
Ghose, S., Kersten, M., Langer, K., Rossi, G. and Ungaretti, L. (1986) Crystal field spectra and Jahn Teller effect of Mn3+ in clinopyroxene and clinoamphiboles from India. Phys. Chem. Mineral, 13, 291–305.CrossRefGoogle Scholar
Langer, K., Smith, G. and Halenius, U. (1982) Reassignment of the absorption spectra of purple yoderite. Phys. Chem. Mineral., 8, 143–5.CrossRefGoogle Scholar
Marfunin, A. S. (1979) Physics and Chemistry of Inorganic Materials. Springer Verlag, Berlin, 340 pp.Google Scholar
Shigley, J. E., Koivula, J. I. and Fryer, C. W. (1987) The occurrence and gemological properties of Wessels Mine sugilite. Gems Gemol, 23, 78–89.CrossRefGoogle Scholar
Smith, G. W. and Strens, R. G. J. (1976) Intervalence-transfer absorption in some silicate, oxide and phosphate minerals. In The Physics and Chemistry of Minerals and Rocks (R. G. J. Strens, ed.) Wiley, New York, 583-612.Google Scholar
Smith, G., Halenius, U. and Langer, K. (1982) Low temperature spectral studies of Mn3+-bearing andalusite and epidote type minerals in the range 30, 000-5, 000 cm“1 . Phys. Chem. Mineral, 8, 136–42.CrossRefGoogle Scholar
Taggart, J. E. Jr., Foord, E. E. and Shigley, J. E. (1994) Chemical composition and structural formula of manganoan sugilite from the Wessels Mine, Republic of South Africa. Mineral. Mag., 58, 679–681.CrossRefGoogle Scholar
von Bezing, K. L., Dixon, R. D., Pohl, D. and Cavallo, G. (1991) The Kalahari manganese field: an update. Mineral. Rec, 22, 279–97.Google Scholar
Wilson, W. E. and Dunn, P. J. (1978) Famous mineral localities: The Kalahari manganese field. Mineral. Rec, 9, 137–53.Google Scholar