- Hausmannite, Calcite
- Thumbnail, 2.5 x 2.3 x 2.0 cm
- N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa
An aesthetic and superb thumbnail of lustrous, jet-black, tetragonal hausmannite crystals on a pastel-red crust coated with tiny andradite garnets and nicely accented in the front with a water-clear, gem calcite rhomb. Beautiful material from the Carl Davis TN Collection.