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Pyrrhotite?

Posted by Reiner Mielke  
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Reiner Mielke July 06, 2012 12:36AM
http://www.mindat.org/photo-474433.html You sure that isn't a pseudomorph of pyrite after pyrrhotite?
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Uwe Kolitsch July 06, 2012 04:09PM
Message sent.
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Rob Woodside July 06, 2012 06:33PM
Sure looks like one. Check the hardness.
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Nik Nikiforou July 06, 2012 11:05PM
Also, Pyrrhotite tends to be magnetic, while pyrite does not.
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Rob Woodside July 09, 2012 06:40PM
Thanks Nik, The Trepca pyrrhotites respond well to a magnet. An even easier check than hardness.
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