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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: 406281" data-attributes="member: 4386"><p>Jasper or chert would probably be reasonable terms. Incidentally, we don't call those surfaces cleavage - cleavage consists of parallel, planar surfaces that have a constant angular relationship to each other if in different directions, We call what is in your specimen fracture, and that particular type of fracture we call conchoidal (I think it comes from conch - like the inside of a shell). It is typical of many types of glass when they break.</p><p>Cleavage is more like this:</p><p><a href="https://www.bing.com/images/search?q=mineral+cleavage+photos&qpvt=mineral+cleavage+photos&FORM=IGRE" target="_blank">https://www.bing.com/images/search?q=mineral+cleavage+photos&qpvt=mineral+cleavage+photos&FORM=IGRE</a></p></blockquote><p></p>
[QUOTE="user 4386, post: 406281, member: 4386"] Jasper or chert would probably be reasonable terms. Incidentally, we don't call those surfaces cleavage - cleavage consists of parallel, planar surfaces that have a constant angular relationship to each other if in different directions, We call what is in your specimen fracture, and that particular type of fracture we call conchoidal (I think it comes from conch - like the inside of a shell). It is typical of many types of glass when they break. Cleavage is more like this: [url]https://www.bing.com/images/search?q=mineral+cleavage+photos&qpvt=mineral+cleavage+photos&FORM=IGRE[/url] [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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