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Gemstones, Minerals & Fossils
Lapidary
Smoky from Lowmead
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<blockquote data-quote="Lefty" data-source="post: 264906" data-attributes="member: 2976"><p>Cheers everyone.</p><p></p><p>Yep, as Heatho says Jukebox, all the quartzes share the same hardness and specific gravity. They are all the same stuff, just different colours. Though as I mentioned, some of it has an annoying twinning property when you go to facet it.</p><p></p><p>As far as I'm aware, opal is quartz as well. Just the molecules are arranged in a different fashion, hence the lower hardness than quartz crystal (which is 7 on Moh's scale) and the amazing play of colours.</p></blockquote><p></p>
[QUOTE="Lefty, post: 264906, member: 2976"] Cheers everyone. Yep, as Heatho says Jukebox, all the quartzes share the same hardness and specific gravity. They are all the same stuff, just different colours. Though as I mentioned, some of it has an annoying twinning property when you go to facet it. As far as I'm aware, opal is quartz as well. Just the molecules are arranged in a different fashion, hence the lower hardness than quartz crystal (which is 7 on Moh's scale) and the amazing play of colours. [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Smoky from Lowmead
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