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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="user 4386" data-source="post: 391182" data-attributes="member: 4386"><p>All you need is a $2 coin, a pocket kinife blade and a bit of quartz to test most hardness. I suspect these would be harder than the coin and probably harder than the steel - almost certainly some sort of chalcedonic silica.</p></blockquote><p></p>
[QUOTE="user 4386, post: 391182, member: 4386"] All you need is a $2 coin, a pocket kinife blade and a bit of quartz to test most hardness. I suspect these would be harder than the coin and probably harder than the steel - almost certainly some sort of chalcedonic silica. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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