Dims: 0.9" x 0.7" x 0.5" (2.3 x 1.8 x 1.3 cm)
Wt: 9.7 g
level 530, Santo Nino vein, Fresnillo, Zacatecas, Mexico
Though this specimen seems to be made up primarily of 2 large crystals, each one of these "crystals" is in turn made up of many smaller orthorombic crystals. These smaller crystals doubtless have an orthorombic form, but they are so intensely intergrown that their size and shape are indeterminate. There is an area on the cluster that seems to be made up of a few very thin intergrown tabular crystals that may be made of polybasite, but I cannot be certain. There is also a considerable amount of damage to the specimen, but I cannot tell if it is human-induced. All the crystals have a dark gray color and a slightly dull metallic luster.