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Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
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<blockquote data-quote="blisters" data-source="post: 171738" data-attributes="member: 4992"><p>Silver, calcrete forms from the leaching of carbonates from surface soils which perculates downwards and the carbonates precipitate out of solution. The carbonates could come from sand etc. I have seen a fair bit of this in WA unless I miss ID'd the rock. The nodules would form like a pearl. My geology memory is fairly distant these days but I think climatic conditions also come into effect as it must be dry enough that there is not too much water to put the precipitated carbonate back into solution.</p><p>Jon</p></blockquote><p></p>
[QUOTE="blisters, post: 171738, member: 4992"] Silver, calcrete forms from the leaching of carbonates from surface soils which perculates downwards and the carbonates precipitate out of solution. The carbonates could come from sand etc. I have seen a fair bit of this in WA unless I miss ID'd the rock. The nodules would form like a pearl. My geology memory is fairly distant these days but I think climatic conditions also come into effect as it must be dry enough that there is not too much water to put the precipitated carbonate back into solution. Jon [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
STONE ?
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