Gold mining - WikipediaGold mining is the resource extraction of gold by mining. As of 2014, the world's largest gold . During the Chola period in the 9th and 10th century AD, the scale of the operation grew. . Using a sluice box to extract gold from placer deposits has long been a very common practice in prospecting and small-scale mining.time to process gold ore,gold processing | BritannicaFeb 7, 2008 . Gold processing, preparation of the ore for use in various products. . During these ancient times, gold was mined from alluvial placers—that is,.
time to process gold ore