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Science
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State the official definition of a mineral, including all the characteristics necessary for a substance to be classified as a mineral. Explain the difference between a rock and a mineral

Jan 8th, 2015

Some official defination of mineral:-

  • "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. H., 1995).
  • "Minerals are naturally-occurring inorganic substances with a definite and predictable chemical composition and physical properties." (O' Donoghue, 1990).
  • "A mineral is a naturally occurring homogeneous solid, inorganically formed, with a definite chemical composition and an ordered atomic arrangement" (Mason, et al, 1968).
Characteristic of mineral:-
  • Solid
  • Inorganic
  • Naturally Orcurring, 
  • Defintite Chemical Compostion
  •  Definite Crystalline Structure
Difference between Rock & Mineral:-
  • Minerals are an economic commodity; they are mined because of the need for a valuable element they contain or an intrinsic property they may have. Other minerals are mined for their beauty and rareness, thus giving many specimens an accepted worldwide value. There are well over 3,000 scientifically classified different types of minerals, and new ones are always being discovered. The vast majority are not known to professional mineral collectors, because they are rare, have no economic purpose, and for the most part do not make good specimens.
  • A Rock is an indefinite mixture of naturally occurring substances, mainly minerals. Its makeup may vary in containment of minerals and organic  substances, and its composition is never exact. Rocks can be composed of tiny microscopic grains of minerals or organic substances to coarse mineal agglomerates where the individual minerals are easily discernible. Rocks may range in size from tiny pebbles to huge mountains. Rocks make up the earth's crust. Many rocks are not solid, such as magma, soil, and clay. Different mineral deposits can be found in related rock formations, providing use by estimating what minerals rock formations may contain.

Jan 8th, 2015

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