Gold processing | Britannica
By 2000 bc the process of purifying gold-silver alloys with salt to remove the silver was developed. The mining of alluvial deposits and, later, lode or vein deposits required crushing prior to gold extraction, and this consumed immense amounts of manpower. By ad 100, up to 40,000 slaves were employed in gold mining in Spain. The advent of,Silver mining - Wikipedia,Silver mining is the resource extraction of silver by mining. Silver is found in a native form very rarely as nuggets, but more usually combined with sulfur, arsenic, antimony, or chlorine and in various ores such as argentite (Ag2S), chlorargyrite ("horn silver," AgCl), and galena (a leadore often containing significant amounts of silver). As silver is often found in conjunction with these or alloyed with other metals such as gold, it usually must be further extracted through amalgamati…Chemistry, Chapter 11 Flashcards | Quizlet,method of extracting gold and silver from their ores. gold. the most malleable and ductile metal. karat. unit used to measure gold purity; equal to 1/24 part. white gold. an alloy of gold and nickel. gold. this precious metal is used in dentistry, medicine, and microcircuitry. silver.