8 Kilos Oro en Muestra de Cuarzo - Oro - Vena Orogénica Au Ver en 4K en YouTube
Clays (white/beige films) → Kaolinite, illite; produced by acid leaching of feldspars and wall rocks. As, Cu, Pb, Zn pathfinders : Arsenopyrite (As) and chalcopyrite (Cu) provide geochemical vectors for exploration.