- Small Cabinet, 5.8 x 4.6 x 3.2 cm
- Black Pine Mine, Philipsburg, Granite County, Montana, USA
Very rare for this locality, this one surprised me when I saw it! This tetrahedrite specimen features a large crystal with one huge face, 5 cm in length, which has a smaller crystal perched on it. There is moderate luster, and the crystals exhibit a dark gray color. Overall, a significant piece from this old mine. I had never seen one larger than a 1 cm sized crystal from this deposit. This is from the personal collection of Josef Vajdak.