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May-June 2018

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Connoisseur's Choice: Hausmannite, N'Chwaning II Mine, Kalahari Manganese Field, Northern Cape Province, South Africa

Black minerals are generally not considered highly desirable among collectors, although there are exceptions. This bias is unfortunate because some black minerals crystallize in aesthetic forms and can be associated with other species that do add color and interest. Such a mineral is hausmannite. N'Chwaning II hausmannite is the featured species of this Connoisseur's Choice column, chosen because it forms large, highly lustrous black crystals and is frequently associated with colorful species such as andradite, datolite, and calcite.

 

Dr. Bruce Cairncross, a consulting editor of Rocks & Minerals, is a geology professor at the University of Johannesburg.

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