Answer :
Minerals are naturally occurring substances which have definite physical properties and chemical composition. Geologists define mineral as a homogenous, naturally occurring substance with a definable internal structure. Minerals are found in various forms ranging from the hardest diamond to the softest talc.
Minerals are the most important elements used in many industries. Gems and other expensive minerals like gold and platinum are widely used for jewel making and jewellery industry. Copper is another important mineral that is used in every industry from coins to pipes.
The advancement of technology has intensified the use of various important minerals. The major component of the computer industry is silicon which is extracted from quartz. Aluminium obtained from its bauxite ore is used in all the major modern industry ranging from automobiles, buildings and even in domestic cookware. Thus every mineral has an important role to play in the daily life of human beings.
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NCERT Geography- Resources and Development