What is a Mineral? Minerals are an inorganic substance that often is characterized by their crystal structure. It is a natural substance in rocks hat has a specific chemical composition that occurs in them. Its chemical structure can be exact, or produced by living organisms. It is the most solid material found on earth.
Most of the rocks consist of at least two different minerals and they may econtain five or six minerals. The proportion of the minerals varies among different types of rocks. The classification of the rocks is done by the way the rocks are formed. There are three categories of rocks, igneous, sedimentary and metamorphic. Igneous rocks are formed when molten magma cools and solidifies. Sedimentary rocks originate fr
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