Index No: NBM014320; Collected By: ; Sample Type: hand sample; Notes: Pyritized mud/siltstone, slightly calcarous, pyrite extremely fine-grained replacement ore, fissures and fractures filled with euhedral to anhedral pyrite crystals intergrown with iron-rich sphalerite, very minor galena grains, abundant massive pyrolusite, surface coating of native arsenic(?) from alteration of arsenopyrite, intergrown quartz crystals in sulfides. Hematite stains from clots of sulfides, solid veins of dark sphalerite, minor gossan.