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Gold Prospecting
Hard Rock Gold Prospecting
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<blockquote data-quote="BigWave" data-source="post: 605480" data-attributes="member: 6786"><p>Galena has a fairly high SG (7.5), but it is also quite soft (MHO 2.5), so wouldn't scratch stainless steel (MHO 5.5~6.3).</p><p>Pyrite has an SG around 5, but is much harder (MHO 6-6.5) so could scratch stainless.</p><p>Iron Pyrite will streak black (on a white un-glazed tile), usually with a tinge of green.</p></blockquote><p></p>
[QUOTE="BigWave, post: 605480, member: 6786"] Galena has a fairly high SG (7.5), but it is also quite soft (MHO 2.5), so wouldn't scratch stainless steel (MHO 5.5~6.3). Pyrite has an SG around 5, but is much harder (MHO 6-6.5) so could scratch stainless. Iron Pyrite will streak black (on a white un-glazed tile), usually with a tinge of green. [/QUOTE]
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Gold Prospecting
Hard Rock Gold Prospecting
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