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Gemstones, Minerals & Fossils
Gemstones and Minerals
Chrystoprase
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<blockquote data-quote="user 4386" data-source="post: 567624" data-attributes="member: 4386"><p>"Chrysoprase results from the deep weathering or lateritization of nickeliferous serpentinites or other ultramafic ophiolite rocks. In the Australian deposits, chrysoprase occurs as veins and nodules with brown goethite and other iron oxides in the magnesite-rich saprolite below an iron and silica cap".</p><p></p><p>While it can occur with nickel deposits. in WA it more commonly occurs with serpentinite, which has a few thousand ppm (e.g. 0.3%) nickel in it even when no nickel ore is present. Usually it is too pale for gem material, but that piece looks like it has some good colour.<img src="https://www.prospectingaustralia.com/forum/img/member-images/4386/1596454612_chrysoprase.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="user 4386, post: 567624, member: 4386"] "Chrysoprase results from the deep weathering or lateritization of nickeliferous serpentinites or other ultramafic ophiolite rocks. In the Australian deposits, chrysoprase occurs as veins and nodules with brown goethite and other iron oxides in the magnesite-rich saprolite below an iron and silica cap". While it can occur with nickel deposits. in WA it more commonly occurs with serpentinite, which has a few thousand ppm (e.g. 0.3%) nickel in it even when no nickel ore is present. Usually it is too pale for gem material, but that piece looks like it has some good colour.[img]https://www.prospectingaustralia.com/forum/img/member-images/4386/1596454612_chrysoprase.jpg[/img] [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Chrystoprase
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