What are minerals? How are they useful for mankind? [V. Imp.] -Geography

What are minerals? How are they useful for mankind? [V. Imp.] -Geography
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Minerals are naturally occurring substances which have certain physical properties and definite chemical composition. Minerals are very useful for mankind. Some minerals like coal, natural gas and petroleum are used as fuels. They are also used in industries. Iron, aluminium, gold, uranium etc. are used in medicine, in Fertilizers, etc
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