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Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
Magnetite crystals
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<blockquote data-quote="user 4386" data-source="post: 648974" data-attributes="member: 4386"><p>Magnetite can occur with gold in ore bodies - but despite seeing many such ore bodies I have not actually seen perfect crystals of magnetite in even one. Quartz also occurs with gold but most gold does not. And magnetite is so common not associated with gold that I would only consider even non-crystalline magnetite an indicator under certain circumstances where I had good reason to expect gold. For example, I have never seen a single example in Victoria. It is more just a mineral that can occur with gold than an indicator that gold may be around. For example non-crystalline magnetite is fairly common with gold in the Pilbara and Eastern Goldfields, around Olympic Dam in SA, around Cloncurry and west of Broken Hill - but magnetite completely unrelated to gold is far, far more common in the Pilbara and Eastern goldfields.</p><p></p><p>Disseminated through a rock (eg mica schist) I would probably not give it a glance.</p></blockquote><p></p>
[QUOTE="user 4386, post: 648974, member: 4386"] Magnetite can occur with gold in ore bodies - but despite seeing many such ore bodies I have not actually seen perfect crystals of magnetite in even one. Quartz also occurs with gold but most gold does not. And magnetite is so common not associated with gold that I would only consider even non-crystalline magnetite an indicator under certain circumstances where I had good reason to expect gold. For example, I have never seen a single example in Victoria. It is more just a mineral that can occur with gold than an indicator that gold may be around. For example non-crystalline magnetite is fairly common with gold in the Pilbara and Eastern Goldfields, around Olympic Dam in SA, around Cloncurry and west of Broken Hill - but magnetite completely unrelated to gold is far, far more common in the Pilbara and Eastern goldfields. Disseminated through a rock (eg mica schist) I would probably not give it a glance. [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones, Minerals & Fossils
Magnetite crystals
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