The gold contained in these rocks has become dragged into streams to sort alluvial (pleasure) gold deposits. Reportedly, gold mining in Arizona began in 1774, once the Spanish priest Manuel López ordered the Papago Indians to scrub gold from gravel around the slopes from the Quijotoa mountains in Pima County. https://preciousmetalinvestments51615.idblogmaker.com/35223674/the-greatest-guide-to-safe-haven-assets