Osmuminerals Ltd is a leading Exporter, Importer and Supplier of Coltan Ore, based in Sierra Leone (Western Africa). Coltan, also known Tantalite, is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in Coltan Ore is Columbite, and the tantalum-dominant mineral is tantalite. Coltan is used primarily for the production of Tantalum Capacitors, used in many electronic devices. Many sources mention the importance of Coltan in the production of cell phones, but this is an over-simplification, as tantalum capacitors are used in almost every kind of electronic device. It is also used in high temperature alloys for air and land based turbines in an industry. Osmuminerals Ltd has export capacity of up to fifty thousand metric tons of Coltan.