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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="Hawkear" data-source="post: 641833" data-attributes="member: 4728"><p>Oh Dear. Possibly a well waterworn plutonic rock like a Gabbro or a metamorphised granitic Gneiss (again from my Pellant).</p><p>Unfortunately SG can be less useful for rocks as opposed to minerals as rocks contain a mixture of different minerals and the SG can vary depending on the mixture ratios.</p><p>You would need to try to identify the minerals present and that would be a starting point.</p><p>Also as likely being igneous in origin, a geological map of the area where the rock was found may name some intrusive rock features nearby.</p><p>Edit. Given its waterworn appearance and lightness it may have travelled some distance from its source so look where the nearest watercourse to where you found it crosses or is near an igneous intrusion upstream.</p></blockquote><p></p>
[QUOTE="Hawkear, post: 641833, member: 4728"] Oh Dear. Possibly a well waterworn plutonic rock like a Gabbro or a metamorphised granitic Gneiss (again from my Pellant). Unfortunately SG can be less useful for rocks as opposed to minerals as rocks contain a mixture of different minerals and the SG can vary depending on the mixture ratios. You would need to try to identify the minerals present and that would be a starting point. Also as likely being igneous in origin, a geological map of the area where the rock was found may name some intrusive rock features nearby. Edit. Given its waterworn appearance and lightness it may have travelled some distance from its source so look where the nearest watercourse to where you found it crosses or is near an igneous intrusion upstream. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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