Furutobeite

  

This exceedingly rare species occurs as hackly, black crystals, to 0.5 cm across, associated with 0.5 cm in length, colourless quartz crystals. Both of these species are on earlier formed, blocky, dark gray crystals of tennantite, up to 1.0 cm across.  ( single crystal XRD analyzed by Marcus Origlieri)

Origin: Tsumeb, Namibia
Ex. Uli Bahmann collection

Sample size: 2.7 x 2.6 x 1.8 cm

 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone