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( Nonmineral)
A nonmineral (mineralogy) is a substance found in a natural environment that does not satisfy the definition of a mineral and is not even a mineraloid. Many non-minerals are mined and have industrial or other uses similar to minerals, such as jewelry. To be classified as a "true" mineral, a substance must be a solid, arising from geological processes, and having a crystal structure. Traditionally, it must also be an inorganic, naturally occurring, homogeneous substance with a defined chemical composition, but now organically derived substances that have been transformed into a crystalline structure are minerals. Some minerals, such as the well-known Apatite and Mica, are not homogeneous substances, but are a mixture of related minerals, sometimes referred to as a mineral group. name="See_also" id="See_also">
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Nonmineral Subcategories
Nonmineral Articles
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