Causes of the Purple and Pink Colours of Manganoan Sugilites from the Wessels Mine, South Africa

Emmanuel Fritsch and James E. Shigley
GIA Research, Gemological Institute of America, 1660 Stewart Street, Santa Monica, California 90404-4088, USA
Keywords: sugilite • manganese • colour • Wessels mine • South Africa

Mineralogical Magazine; December 1994 v. 58; no. 393; p. 681-685; DOI: 10.1180/minmag.1994.058.393.20
© 1994, The Mineralogical Society
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