Dims: 0.98x0.91x0.51" (2.5x2.3x1.3cm)
Wt: 0.64oz (18.0g)
Daly-Judge Mine, Summit County, Utah, USA
This large thumbnail specimen of tetrahedrite displays four recognizable tetrahedron crystals, plus several other fragments. All are intergrown, and all are incomplete, primarily due to that intergrowth. Only one crystal has all 4 faces visible. Still, the crystals are easily identified. The tetrahedrite is accompanied by numerous small cubes of pyrite, and a tiny bumpy blue area with the color of covellite, but it is likely just a blue tarnish on a pyrite fracture surface.