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Gemstones, Minerals & Fossils
Lapidary
Stones I have cut
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<blockquote data-quote="user 4386" data-source="post: 444035" data-attributes="member: 4386"><p>Does seem unlikely. Even when very waterworn and rounded, tourmaline will usually show some rod-like shapes.</p><p>That is a strong conchoidal to sub-conchoidal fracture - not a lot of minerals have it so strong. Try looking up fracture in some mineral tables (like the book I recommended), followed by sorting possibilities by colour (it may suggest something else - I am a bit busy at present).</p><p></p><p>Flame tests are worth a try, as they can give an idea of the main element the mineral consists of.</p></blockquote><p></p>
[QUOTE="user 4386, post: 444035, member: 4386"] Does seem unlikely. Even when very waterworn and rounded, tourmaline will usually show some rod-like shapes. That is a strong conchoidal to sub-conchoidal fracture - not a lot of minerals have it so strong. Try looking up fracture in some mineral tables (like the book I recommended), followed by sorting possibilities by colour (it may suggest something else - I am a bit busy at present). Flame tests are worth a try, as they can give an idea of the main element the mineral consists of. [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Stones I have cut
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