Hematite is a common iron ore. Due to its high iron content, its color is usually reddish brown. It is formed by chemical reactions between iron oxide ore and iron ore. The main component of iron oxide ore is iron oxide, which reacts chemically with iron ore with high iron content in the ai

??? ????? ??????? ???????? ????? ???????, ????? ????????? ??? ???????, ???????? ????????? ????????? ?????????? ????????. ??? ?????????? ?????? — ??????????? ???????, ??????? ???????? ?????? ?????? ??? ?????????? ?????. ??? ?????????? ????? ??????? ?????? ?????? ? ?????? ??????