- Tazna Mine (Tasna Mine; Tazna-Rosario Mine), Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosi Department, Bolivia
- Miniature, 4.3 x 3.7 x 3.5 cm
This was one of the very few matrix pieces from the recent find of these amazing specimens. This is an eloquent piece featuring several sharp, lustrous, jet black blades of Ferberite associated with a few gemmy Quartz crystals. There are several crystals on the front of the specimen which are actually a multi-twinned crystal group.