Isicelo:Lolu chungechunge lwemikhiqizo lunomkhakha kazibuthe ongemuva ophakeme kakhulu ongakwazi ukuzuzwa ngemishini evamile kazibuthe, futhi lungahlukanisa ngempumelelo izinto ezinozibuthe ezibuthakathaka kumaminerali anohlamvu olucolekile. Lufanele ukusizakala ngezinsimbi ezingavamile, izinsimbi ezingezona ayoni metallic ores, njengokunothisa i-cobalt ore, ukususwa kokungcola kanye nokuhlanzwa kwe-kaolin kanye ne-feldspar non-metallic ores, futhi ingasetshenziswa ekuhlanzeni indle nokuhlanzwa kwamanzi olwandle neminye imikhakha.