![]() "A mineral is a body produced by the processes of inorganic nature, having usually a definite chemical composition and, if formed under favorable conditions, a certain characteristic atomic structure which is expressed in its crystalline form and other physical properties" (Dana & Ford,1932).can be distinguished from one another by individual characteristics that arise directly from the kinds of atoms they contain and the arrangements these atoms make inside them" (Sinkankas, 1966). "A mineral is a naturally occurring homogeneous solid, inorganically formed, with a definite chemical composition and an ordered atomic arrangement" (Mason, et al,1968)."Minerals are naturally-occurring inorganic substances with a definite and predictable chemical composition and physical properties." (O' Donoghue,1990)."A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes" (Nickel, E.Ores: Those minerals from which a metals can be extracted convenietly and profitably. (iii) Refining (purification) of impure metalī. (ii) Conversion of concentrated ore into metal (i) Concentration of ores (or enrichment of ore) The major steps involved for the extraction of a metal from its ore are: ![]() Metallurgy: The various processes involved in the extraction of metals from its ores and refining is called metallurgy.
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