Brassy 6-sided pyrrhotite crystals to 0.8 cm across are intergrown with black sphalerite var. marmatite crystals to 1 cm across, on a massive sulfide matrix. Tan microcrystalline botryoidal siderite covers many pyrrhotite and sphalerite crystals. White translucent scalenohedral calcite to 0.3 cm long also present. Some minor edge-chipping on a few pyrrhotites. Nice combo specimen – Mexican pyrrhotites are not seen much in dealer stocks anymore...