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<blockquote data-quote="kinosfronimos" data-source="post: 1190200" data-attributes="member: 14190"><p>Sorry to say, but this is a common misconception. Coal is 65-85% organic carbon (impure plant matter), while diamonds are 99.9% pure elemental carbon (inorganic). Else you'd have deeply buried coal seams turning into meters thick beds of diamond. Rather, diamonds are xenocrysts formed in the deep mantle (of usualy primordial carbon) which are entrained and brought to the surface by kimberlitic volcanoes.</p></blockquote><p></p>
[QUOTE="kinosfronimos, post: 1190200, member: 14190"] Sorry to say, but this is a common misconception. Coal is 65-85% organic carbon (impure plant matter), while diamonds are 99.9% pure elemental carbon (inorganic). Else you'd have deeply buried coal seams turning into meters thick beds of diamond. Rather, diamonds are xenocrysts formed in the deep mantle (of usualy primordial carbon) which are entrained and brought to the surface by kimberlitic volcanoes. [/QUOTE]
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