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Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
Please help me identify this stone, is it possibly green quartz?
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<blockquote data-quote="Hawkear" data-source="post: 638432" data-attributes="member: 4728"><p>Greenstone is a more generic term and can also include jades and other rocks of greenish hue and has no specific lithologic definition. </p><p>The Archean greenstone belts of the WA cratons are widespread and associated with the mantle layers that were close to the surface in those Archean times. </p><p>In other places the only way they mantle rocks could be brought to the surface was from deep eruptions through overlying rocks and are therefore less widespread and much younger but still of the same mantle layer composition. Because these eruptive events occurred quickly they brought diamonds to the surface at such speed that they were prevented from oxidising (burning) before the dyke cooled.</p><p>If you've ever wanted to see a diamond burning just you tube or google it. Diamonds are common in mantle rocks but rare at the surface for this reason. </p><p>Diamonds are a result therefore of the eruptive speed and rate at which the dyke rock cooled. </p><p>For all of that we are probably talking about the same rock Greenstone, Peridotite or Kimberlite.</p></blockquote><p></p>
[QUOTE="Hawkear, post: 638432, member: 4728"] Greenstone is a more generic term and can also include jades and other rocks of greenish hue and has no specific lithologic definition. The Archean greenstone belts of the WA cratons are widespread and associated with the mantle layers that were close to the surface in those Archean times. In other places the only way they mantle rocks could be brought to the surface was from deep eruptions through overlying rocks and are therefore less widespread and much younger but still of the same mantle layer composition. Because these eruptive events occurred quickly they brought diamonds to the surface at such speed that they were prevented from oxidising (burning) before the dyke cooled. If you've ever wanted to see a diamond burning just you tube or google it. Diamonds are common in mantle rocks but rare at the surface for this reason. Diamonds are a result therefore of the eruptive speed and rate at which the dyke rock cooled. For all of that we are probably talking about the same rock Greenstone, Peridotite or Kimberlite. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
Please help me identify this stone, is it possibly green quartz?
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