Dzelzs ir otrs izplatītākais elements uz zemes un ietver gandrīz 5% no zemes garozas. Dzelzs rūdas ir akmeņi un minerāli, kas satur metālisku dzelzi, ko iegūst,

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

“If it can’t be grown it must be mined” is a common adage in the mining industry, and that’s not much of an exaggeration. It’s hard to think of any