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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="Guessologist" data-source="post: 450472" data-attributes="member: 11952"><p>I suppose you've got me there, I'm mostly inferring it from the abundance of chromian muscovite (the old 'selwynite') known further up the range. I doubt anyone has tested it. I guess the greenstones do have a relatively high nickel content despite the lack of decent Ni mineralisation so it could well be responsible. I honestly don't know too much about the geology of chrysoprase proper, but that's an interesting question - if both chromium and nickel are present when chalcedony is forming, does one contribute more to the colouration?</p></blockquote><p></p>
[QUOTE="Guessologist, post: 450472, member: 11952"] I suppose you've got me there, I'm mostly inferring it from the abundance of chromian muscovite (the old 'selwynite') known further up the range. I doubt anyone has tested it. I guess the greenstones do have a relatively high nickel content despite the lack of decent Ni mineralisation so it could well be responsible. I honestly don't know too much about the geology of chrysoprase proper, but that's an interesting question - if both chromium and nickel are present when chalcedony is forming, does one contribute more to the colouration? [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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