1. Hematite is an ore of iron. It is commonly found in stones and soil. The largest quantity of iron in the earth is found in the form of hematite.

2. The chemical formula of hematite is Fe2O3. It is a heavy and relatively hard oxide mineral.

  3. Its colour ranges from black to steel or silver-grey, grey to brown or reddish.

4. Hematite is used in the production of iron. It is an important mineral that is found in many countries around the world.

According to the 2011 census, Bihar state has the highest fertility rate in India.

1. According to the 2011 census, India's population was 1,210,193,422 (1.21 billion).

1. The state with the largest coal reserves in India is Jharkhand.

2. Coal reserves in India are mainly located in the older Gondwana formations of peninsular India and the younger Tertiary formations of the north-eastern region.

3. About 80 per cent of the coal reserves in India are bituminous type and belong to the non-coal category.