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A mineral is a naturally occurring substance, representable by a chemical formula, that is usually solid and inorganic, and has a crystal structure. It is different from a rock, which can be an aggregate of minerals or non-minerals and does not have a specific chemical composition.
A mineral is a chemical compound with a given composition and a defined crystal structure.[5] A rock is a mixture of one or several minerals, in varying proportions. A rock has only two of the characteristics minerals haveâit is a solid and it forms naturally.A rock usually contains two or more types of minerals.Two samples of the same type of rock may have different kinds of minerals in them.Minerals are always made up of the same materials in nearly the same proportions.est Answer: A mineral is a homogeneous naturally occurring substance with a definite but not necessarily fixed chemical composition. Most minerals are solids with an ordered atomic arrangement, and most are inorganic in the chemical sense of that word Minerals are different from rocks.