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It is a common misconception that the mineral diamond results from pressure and heat on coal. Diamond crystals form from naturally occurring carbon at depths greater than 100 miles, a depth that no sedimentary coal seams have ever reached. Additionally, all diamonds that are known to exist on the surface today have been brought to the surface through violent volcanic eruptions. These diamonds are around one billion years old; coal deposits are a much younger Earth feature, having formed from plants that lived in the Carboniferous Period, 354 to 290 million years ago. Therefore, a diamond meets the criterion for a mineral: inorganic, solid, naturally occurring, definite chemical formula, and crystalline structure.

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Q: Since diamonds began life as coal which is organic you teach that diamonds are thus organic and cannot be classified as minerals which by definition must be inorganic true?
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What are minerals mineral groups?

Minerals are classified as oxides, sulfides, halides, sulfates, silicates, or carbonates. Some elements are also classified as minerals. There's also a metallic and non-metallic mineral classification.


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Minerals are the components in the Earth that combine to form rocks. Minerals are inorganic naturally occurring substances, have a definite range of chemical composition, are solids, and have a crystalline structure.Minerals are solid, inorganic substances made from a combination of chemical elements.a solid, naturally occurring inorganic substance.


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Minerals, although they can "grow" as crystals, are not alive and are therefore classified as inorganic matter.To be classified as a mineral, a substance must be a solid, have a crystalline structure, be inorganic, be naturally occuring, and have a very specific range of chemical formulae.


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