iron

This is a feat in today's scientific and modern era iron has great importance. The industrial revolution was started and reached to height BECUASE of iron. Iron is used more than any metal. Man is using iron from thousands of years.
Importance of Iron Ore:
Today iron is significant used in ship rail planes numerous machine and various industries. Without iron no country could live on in term of economic social and military perspective. Iron is usually found in form of ores and it used significantly for steel production. All iron ores which contain less than 40% of iron proportion are insignificant for commercial purpose.
Importance Iron Ores:
Iron ore is a mineral substance which heated and processed yield metallic iron (fe). It almost always consists of iron oxides.; different iron ores contain different percentage of iron substance. On the basis of this proportion following four compounds are important. These are magnetic hematite siderite and limonite. 
Magnetite:
This iron ore contain rich iron proportion more than 70% are found in black colour Sweden is famous for this iron ore.
Hematite:
This iron ore contains 70% of iron and usually found in red color Australia USA and India are important countries for this ore.
Limonite:
In this type of iron ore iron proportion found about 50% and it occur in yellowish brown color.
Siderite:
This type of iron ore contains about 40-48% of iron and it's found in brown color.
Major reserve:
There are five major reserve world wide.
1 hamersley basin in Western Australia.
2 lake superior region in North America.
3 transversal region in South Africa.
4 krivoy dog region in the Ukraine.
5 minas gerais region in Brazil..