Dims: 2.8x2.2x2.2" (7.0x5.6x5.6cm)
Wt: 12.2 oz. (344g)
Colquechaca, Potosi, Bolivia
This cylindrite specimen has some of the largest (diameter) cylindrite crystals I have ever seen. Many specimens have much longer crystals, but I don't remember any as "fat" as these. A number of the crystals exceed 2mm in diameter, with one approaching 3mm. There are many somewhat radial clusters of crystals, although for the most part, the specimen is composed of masses of intergrown cylinders. There are other minerals present, notably including many small transparent quartz crystals, patches of what appears to be sphalerite, and some interesting black "roses" which may be hematite.