- Tazna Mine (Tasna Mine; Tazna-Rosario Mine), Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosi Department, Bolivia
- Small Cabinet, 7.0 x 6.3 x 5.8 cm
This was one of the very few matrix pieces from the recent find of these amazing specimens. This species was sometimes previously referred to as "Wolframite," which was supposed to be an intermediary species between Ferberite and Hubnerite, but has since been discredited. This is an eloquent piece featuring several sharp, lustrous, jet black blades of Ferberite measuring up to 3.2 x 3.0 cm aesthetically sitting on Quartz and host rock matrix.