Iron is the second most common element on earth and comprises nearly 5% of the earth’s crust. Iron ores are rocks and minerals that contain metallic iron that’s extracted by

Večina kamnin vsebuje nekaj kovin ali mineralov. Vsi niso dovolj pomembni, da upravičujejo rudarstvo.. Those that do contain commercially valuable materials are the

"Če ga ni mogoče gojiti, ga je treba minovati" je pogosta reklama v rudarski industriji., in to ni veliko pretiravanje. It’s hard to think of any