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Black tungsten ore

Black tungsten ore

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The chemical composition is (Fe, Mn) WO4, which is an important tungsten ore and the main mineral raw material for extracting tungsten. Named after the presence of different proportions of iron tungstate and manganese tungstate, it is called tungsten iron ore when the iron content is high and tungsten manganese ore when the manganese content is high. Usually brown or black in color, with metallic or semi metallic luster, often found together with tin ore in granite and quartz mines. Hardness is 4-5.5, specific gravity is 7.1-7.5, brittle, and has weak magnetism. It is generally produced in high-temperature hydrothermal quartz veins and their surrounding rocks of quartzite. The regions of southern Jiangxi, eastern Hunan, and northern Guangdong in China are world-renowned areas for black tungsten mineral deposits.