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Minerals ArkansasIn the bauxite refining process, the aluminum-bearing minerals in bauxite are converted in a multiple-step process to alumina (Al2O3). Alumina can be smelted to form ...Iron or

iron ore physical nc-mapss.orgPhysical iron ore prices rise despite limited trading . Prices for iron ore in the physical market continued to strengthen on Thursday February 9 although trading

Mining in Sierra Leone WikipediaThe mining industry of Sierra Leone accounted for 4.5 percent of the country's GDP in 2007 and minerals made up 79 percent of total export revenue with diamonds