- Sturmanite, Quartz
- Miniature, 3.5 x 3.1 x 2.0 cm
- N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa
- Ex. Rob Smith
Bladed, gemmy, yellow sturmanite crystals from the famous N'Chwaning II Mine of South Africa. The large blade is 1.0 cm and the 3-dimensional, massive manganite matrix is richly covered with glassy needle quartz crystals. Ex Rob Smith Collection.