The major mineral is copper, mined at Kilembe and processed at Jinja. Other minerals of economic importance are wolfram (tungsten), beryl, tin, apatite, gold, and bismuth, mined by small miners scattered all over the country with a heavy concentration in Ankole and Kigezi Districts in south-western Uganda. In addition the bulk of the country's limestone - used mainly for the supply of lime to cement factories - is mined at Tororo and Hima.