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Gemstones, Minerals & Fossils
Meteorites
Is this potentially a meteorite? Dont look at the blue/green colours they are all reflections. Real colour is silver
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<blockquote data-quote="user 4386" data-source="post: 643071" data-attributes="member: 4386"><p>Fusion crusts are only on the outside of meteorites, so if this was one broken open, that would not be diagnostic. Some don't even show much of a fusion crust (eg look at this one from Port Curtis Qld.)</p><p></p><p>[ATTACH=full]1430[/ATTACH]</p><p></p><p>I forgot to mention that the hardness of meteoritic iron is very variable because of the various proportions of nickel iron minerals that can be present, but is typically 4 to 5. Magnetite is 5 to 6.. Glass will commonlky scratch a meteoritic iron but not magnetite (but sometimes can scratch magnetite weakly) .</p><p></p><p>The first thing is to determine if it is even magnetic - which should take a few seconds once you find a needle and is fairly conclusive for iron meteorites being a possibility (i.e. in that all are magnetic). "Gold" coins are tricky - might scratch meteoritic iron but sometimes not, will not scratch magnetite (problem is coins used to be softer at 3.5 but are commonly ayt least 4 now.</p><p></p><p>Iron metorites do not have quartz and felspar (light minerals) as in post #3</p></blockquote><p></p>
[QUOTE="user 4386, post: 643071, member: 4386"] Fusion crusts are only on the outside of meteorites, so if this was one broken open, that would not be diagnostic. Some don't even show much of a fusion crust (eg look at this one from Port Curtis Qld.) [ATTACH type="full"]1430[/ATTACH] I forgot to mention that the hardness of meteoritic iron is very variable because of the various proportions of nickel iron minerals that can be present, but is typically 4 to 5. Magnetite is 5 to 6.. Glass will commonlky scratch a meteoritic iron but not magnetite (but sometimes can scratch magnetite weakly) . The first thing is to determine if it is even magnetic - which should take a few seconds once you find a needle and is fairly conclusive for iron meteorites being a possibility (i.e. in that all are magnetic). "Gold" coins are tricky - might scratch meteoritic iron but sometimes not, will not scratch magnetite (problem is coins used to be softer at 3.5 but are commonly ayt least 4 now. Iron metorites do not have quartz and felspar (light minerals) as in post #3 [/QUOTE]
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Gemstones, Minerals & Fossils
Meteorites
Is this potentially a meteorite? Dont look at the blue/green colours they are all reflections. Real colour is silver
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