A mineral is an inorganic substance formed naturally. They are infact building blocks from which rocks are made and they may form
crystals.
Minerals are produced by the physical force of the earth. They are the basic units of rocks. Every rock can be considered as the accumulation of minerals. Geologists classify rock principally according to the way which they are formed, not according to their composition as most rocks consist of two or more than two different minerals. As rocks are formed by minerals, therefore there are three kinds of rocks igneous, sedimentary and metamorphic.
The igneous rocks are formed when the molten magma cools and solidifies.
The sedimentary rocks originate from the deposits of material worn away from the plants and animals and also by the pre existing rocks.
Metamorphic rocks are formed by the alteration of pre existing rocks by great heat or pressure.
The abundant element in these rocks is oxygen and silicon. Because of this the mineral silica is very often found in the rocks. In the rocks the silica is combined with other elements such as aluminium, calcium, iron, magnesium, pottasium, or sodium
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