Ntchito:Makina ophatikizika a mphete yonyowa yonyowa yamagetsi yakhala ikugwiritsidwa ntchito kwambiri pakulekanitsa konyowa kwa ore ofooka maginito zitsulo monga hematite, limonite, siderite, chromites, limonite, wolfram etc komanso kupatukana kwachitsulo pakuyeretsa mchere wopanda chitsulo, monga quartz. , feldspar, nightline, fluorite, kaolin etc.