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Gemstones, Minerals & Fossils
Gemstones and Minerals
Is spinel ALWAYS with sapphire?
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<blockquote data-quote="Lefty" data-source="post: 286576" data-attributes="member: 2976"><p>Black spinel facets a nice looking stone in it's own right, especially in a checkerboard crown. Takes on a brilliant polish.</p><p></p><p>I don't know if it's <em>always</em> associated with sapphire but it certainly seems to be in a lot of places, as pointed out previously it shares some chemical similarities with sapphire (sapphire=aluminium oxide, black spinel=magnesium aluminium oxide).</p><p></p><p>Another stone at least sometimes associated with sapphire is pyrope garnet.</p></blockquote><p></p>
[QUOTE="Lefty, post: 286576, member: 2976"] Black spinel facets a nice looking stone in it's own right, especially in a checkerboard crown. Takes on a brilliant polish. I don't know if it's [i]always[/i] associated with sapphire but it certainly seems to be in a lot of places, as pointed out previously it shares some chemical similarities with sapphire (sapphire=aluminium oxide, black spinel=magnesium aluminium oxide). Another stone at least sometimes associated with sapphire is pyrope garnet. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Is spinel ALWAYS with sapphire?
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