Which type of iron ore is also termed as brown ore?

The Correct Answer is limonite

Key PointsIron Ore:

• It is a metallic mineral and is found in the form of ore or a compound in nature.
• Earth's most important iron ore deposits are found in sedimentary rocks.
• They are formed by chemical reactions that combine iron and oxygen in marine and freshwaters.
• There are different types of iron ore:
  • Haematite: 
    • It contains about 60 to 70% iron.
    • It is massive, hard, compact, and lumpy ore with reddish or ochre red in color.
  • Magnetite:
    • It is the best type of iron ore and contains up to 72.4% iron in itself.
    • It is dark brown to blackish in color and is termed black ore.
  • Limonite:
    • The ferrous content of limonite ore varies from 35-50%.It is called brown ore
  • Siderite:
    • It contains iron ranging from 10-48%.
    • It is an inferior variety of iron ore.