Iron ni kipengele cha pili cha kawaida duniani na inajumuisha karibu 5% ya ardhi ya dunia. Iron ores are rocks and minerals that contain metallic iron that’s extracted by

Most rocks contain some form of metals or minerals. Not all of them have a concentration significant enough to justify mining. Those that do contain commercially valuable materials are the

"Kama haiwezi kukua ni lazima kuchimbwa" ni adage ya kawaida katika sekta ya madini, na hiyo sio mengi ya kutia chumvi. It’s hard to think of any