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Gemstones, Minerals & Fossils
Gemstones and Minerals
unknown find from slatey
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<blockquote data-quote="shivan" data-source="post: 289271" data-attributes="member: 194"><p>Just been doing a bit more reading and found an interesting article i had read a while ago that may interest you Lefty on the formation of agate.</p><p><a href="http://news.psu.edu/story/140648/2001/09/01/research/how-do-agates-form" target="_blank">http://news.psu.edu/story/140648/2001/09/01/research/how-do-agates-form</a></p><p></p><p>I found it interesting the two different theories on how the agate precipitated, but it is commonly accepted that agate forms at low pressure and temp:</p><p></p><p></p><p>I still am trying to understand how the silica can get dissolved in cooler waters, i understand we are not talking quartz, but silica. But again i was still under the impression the waters needed to be heated to allow the the silica to dissolve into water and allow super saturation of silica in the water, unless acidification of the silica had been present.</p><p>I am finding it hard to find any new information on this as most publications seem from the 50's such as:</p><p><a href="http://ngds.egi.utah.edu/files/GL03781/GL03781.pdf" target="_blank">http://ngds.egi.utah.edu/files/GL03781/GL03781.pdf</a> </p><p></p><p>There seems to be something about the process i am not understanding or misinterpreting. Will go back over it all a bit later.</p></blockquote><p></p>
[QUOTE="shivan, post: 289271, member: 194"] Just been doing a bit more reading and found an interesting article i had read a while ago that may interest you Lefty on the formation of agate. [url]http://news.psu.edu/story/140648/2001/09/01/research/how-do-agates-form[/url] I found it interesting the two different theories on how the agate precipitated, but it is commonly accepted that agate forms at low pressure and temp: I still am trying to understand how the silica can get dissolved in cooler waters, i understand we are not talking quartz, but silica. But again i was still under the impression the waters needed to be heated to allow the the silica to dissolve into water and allow super saturation of silica in the water, unless acidification of the silica had been present. I am finding it hard to find any new information on this as most publications seem from the 50's such as: [url]http://ngds.egi.utah.edu/files/GL03781/GL03781.pdf[/url] There seems to be something about the process i am not understanding or misinterpreting. Will go back over it all a bit later. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
unknown find from slatey
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