The mineral coltan was very scarce, as in the 1990s was booming electronics industry. Since that time, there is a real struggle in the Congo to the mineral. Coltan is a rare mineral and is used for the production of modern electronics. The coltan ore is used in video cameras, computer chips, rocket, space shuttle and mobile phones.
It is a mixture of columbite tantalite and. In the Kivu region is the most important Coltanmine. Coltan is among the most precious raw materials, which occur in Central Africa and is a friable, black mineral. From this material, tantalum is extracted.