Mineral: Calcite
Chemistry: CaCO3
Size: 65 mm
Owner: Geoff Krasnov
Photographer: Geoff Krasnov

An unusual example of calcite from Tsumeb, comprising a group of composite crystals with highly modified rhombohedral forms, growing mutually sub-parallel to form an attractive curvilinear aggregate. 

The calcite is cloudy white and translucent, except at the crystal terminations where the cloudiness gives way to a zone of colourless transparency.

The specimen was formerly in the collection of Herbert Nägele (of Windhoek), and it was allegedly recovered in 1994 from a small and isolated pocket in the mine, although the location of the pocket is not recorded.