colorful of iron ore rock in various sizes crushing into small pieces then smelted in blast furnaces become different type of stel

added are background become blast bulldozer cabochon carbon collection colorful construction crushing decorative different dropped earthmover excavation excavator furnaces gemmology gemological gemology gemstone geological geology gray haematite heavyduty hematite impurities iron isolated jewelry machine machinery macro material metal metallic mineral mining natural object ore ornamental pebble piece pieces processing raw red removed rock rough rust sample sand sandpit shadows sizes small smelted specimen steel stone structure surface textured then types various white