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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="user 4386" data-source="post: 404716" data-attributes="member: 4386"><p>Diamonds almost all occur in kimberlite pipes prior to erosion. These are quite rare and come from very great depth, and are mostly only emplaced into very old rocks. Sapphires tend to be associated with alkali basalts in many parts of the world and these are widespread (the exceptions are in other very rare rock associations). They come from lesser depth and don't care what age rocks they are emplaced in. So far more sources for sapphires than diamonds (the same follows for the alluvial stones as they depend on the hard-rock sources). There is method in it all Lefty....</p></blockquote><p></p>
[QUOTE="user 4386, post: 404716, member: 4386"] Diamonds almost all occur in kimberlite pipes prior to erosion. These are quite rare and come from very great depth, and are mostly only emplaced into very old rocks. Sapphires tend to be associated with alkali basalts in many parts of the world and these are widespread (the exceptions are in other very rare rock associations). They come from lesser depth and don't care what age rocks they are emplaced in. So far more sources for sapphires than diamonds (the same follows for the alluvial stones as they depend on the hard-rock sources). There is method in it all Lefty.... [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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