Index No: NBM013670; Collected By: ; Sample Type: hand sample; Notes: Quartz vein, highly fractured, almost brecciated, fragments milled, abundant sericite, clots and pods oxidized sulfides (pyrite, chalcopyrite?), specks malachite - open spaces lined with euhedral-subhedral quartz crystals, MnO2 stains, vein in contact with argillically altered, silicious intrusive.