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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="Dihusky" data-source="post: 462397" data-attributes="member: 10304"><p>They look to be some very interesting pieces of rough, the Granite belt is known for its Topaz which tends to be light brown, clear of blue, we were there over Christmas and it's getting harder to find now, but still there. The first test to confirm is Specific Gravity, Topaz is 3.49-3.57 whereas Quartz is around 2.65, if it turns out to be quartz then you'll likely have Citrine.</p><p></p><p>Topaz is an orthorhombic crystal so it can present striations running parallel the long axis, it also has low 'tenacity' meaning it can easily fracture/cleave meaning it breaks easily at right angles to the long axis. Looking as the erratic fractures in these crystals would indicate that quartz might be more likely, but an SG will be the quickest confirmation.</p><p></p><p>If you're in SE Qld, more than happy to help identify them.</p></blockquote><p></p>
[QUOTE="Dihusky, post: 462397, member: 10304"] They look to be some very interesting pieces of rough, the Granite belt is known for its Topaz which tends to be light brown, clear of blue, we were there over Christmas and it's getting harder to find now, but still there. The first test to confirm is Specific Gravity, Topaz is 3.49-3.57 whereas Quartz is around 2.65, if it turns out to be quartz then you'll likely have Citrine. Topaz is an orthorhombic crystal so it can present striations running parallel the long axis, it also has low 'tenacity' meaning it can easily fracture/cleave meaning it breaks easily at right angles to the long axis. Looking as the erratic fractures in these crystals would indicate that quartz might be more likely, but an SG will be the quickest confirmation. If you're in SE Qld, more than happy to help identify them. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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