- Thumbnail, 2.6 x 1.8 x 1.6 cm
- Tsumeb Mine, Namibia
- Ex. Carl Acosta
Stacked octahedrons of lustrous, black tennantite, to 1.8 cm in length, form a competition-quality specimen. Only a tiny contact on the bottom of the main crystal keeps this from being a pristine world class tennantite.