- Furutobeite (Analyzed) With Quartz on Tennantite
- Thumbnail, 2.7 x 2.6 x 1.8 cm
- Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
- Ex. Uli Bahmann
This exceedingly rare species occurs as hackly, black crystals, to .5 cm across, associated with .5 cm in length, colorless quartz crystals. Both of these species are on earlier formed, blocky, dark gray crystals of tennantite, up to 1.0 cm across. True furutobeite is very rare and analysis must be performed by a skilled individual to establish its identity solidly. This specimen has exceptional crystals, starkly perched on contrasting matrix because of the quartz sprays. Analsysis was performed by Dr. Marcus Origlieri.