8 Columbite Wolframite and Tantalite Coltan Mining Coltan is a highly valuable mineral that is used in the electrical and cable making industry to improve alloy strength They are found in large deposits in countries like Canada Australia Brazil and China 9 Granite Mining Granite is a type of stone that is used in the construction
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Get PriceMay 20 2021· Live event Unpacking Sierra Leone s mineral potential Sierra Leone is richly endowed with minerals such as iron ore rutile diamonds bauxite gold platinum zircon ilmenite chromite and columbite tantalite coltan Since April 2021 the Sierra Leone government has issued three large scale mining licences Seawright Mining
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