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Jun 20, 2018 · Source from Jiangxi Hengcheng Mining Equipment Co., Ltd. on mineral processing equipment precious stones washer. . to separate & recover those small even very fine size rare metal & precious material. .precious stone mining equipment - Mineral Processing EPC,Gem Tools, Gem Tools Suppliers and Manufacturers at precious stone mining equipment. About 51% of these are jewelry tools & equipment, 1% are other hand tools, and 1% are mining machinery parts.Mining - Wikipedia,Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an orebody, lode, vein, seam, reef or placer deposit.These deposits form a mineralized package that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.