Dims: 3.47x3.38x2.81" (8.82x8.58x7.14cm)
Wt: 22.44oz (635g)
This large hand specimen is mostly sphalerite by weight, and it also contains several large galena crystals, quite a bit of pyrite, and some quartz crystals. The sphalerite appears black and opaque, with an interesting branched structure and a surface growth pattern that looks like stacks of flat crystals (but it is really a single crystal). THe galena has a dull, weathered appearance, but its cubic form, stepped growth, and light gray color is distinctive. The pyrite shows two habits. The bottom half of the specimen has larger crystals in typical but distorted shapes of cubes and pyritohedrons, but the top half of the specimen has distinct sheets of tiny pyrite crystals, probably an overgrowth (or replacement) of another mineral that has since disolved.