- Chalcocite, Tennantite
- Small Cabinet, 9.3 x 7.2 x 7.0 cm
- Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
This huge specimen is a complete, euhedral tennantite tetrahedron with excellent form and for an added touch the crystal is coated by grayish Chalcocite in unusual "thread-like" parallel growths. Ex. Rob Smith Collection.