A mineral is naturally occuring substanceof definite chemical compositon and identifiable physical properties.An ore is a mineral or combination of minerals from which a useual substance which a useful substance such as metal,can be extracted and used to manufacture useful products.
Minerals are formed over aa period of millianors of years in the Earth's crust.Iron aluminium,zinc,magnese and copper are important raw metirials for industrial use.Important non-metalic resources include coal,salt,caly,cement and silica.Stone used for building meterial ,such as grantle ,marble ,limestone,constitue anither category of minerals.Minerals with special special properties that human value for their aesthetic and ornametal value are gems such as diamonds,emeralds and rubies .The luster of gold,silver and platinum is used for ornaments .Minerals in the form of oil gas and coal were formed whe ancient plants and animals were converted in to underground fossil fuels.
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