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Post by DigDug on Jul 14, 2010 11:42:04 GMT -5
photos showing both sides I can see the pyrite...or what I presume is Py. I have been through my reference books and can not find them. I checked them under UV, they do not glow. Is it correct to say this material is only on surface.   One on left has mostly blue with 'pyrite?' on one edge and a two small splashz of magenta One on right...well, you can see that one better Both have pretty good weight for stones approx. 1" x 3/4" x 1/2" |
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Post by 41dave on Jul 14, 2010 12:16:48 GMT -5
The one on the right is Bornite or more commonly called Peacock Ore, its a copper sulfide by-product.
The other, hard to tell, could be magnetite, hematite, or a host of other things, but it too would fall under the category of a sulfide mineral.
-Dave
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Post by DigDug on Jul 14, 2010 13:03:46 GMT -5
thanks Dave
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Post by lauriesrocks on Jul 15, 2010 14:24:50 GMT -5
Dave is absolutely spot on with this one. The blackish piece on the left seems to have crystals. If so, check to see if they are octohedrons (Like two 4-sided pyramids joined base to base.). If so, it would surely be magnetite.
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Post by DigDug on Jul 15, 2010 15:16:35 GMT -5
I found my industrial 'pick up a truck' magnet,
the one on the left has a VERY strong magnetic field
which is odd, I have some magnetite ' they dull greyish variety
and the magfield on that is much weaker, could it have an iron content?
Need to make an "anti-alien" pendant from this....LOL
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Post by earthnhands on Jul 16, 2010 10:18:37 GMT -5
from what local is the peacock ore? very pretty. thanks for showing.
rebecca
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Post by DigDug on Jul 16, 2010 11:13:34 GMT -5
from what local is the peacock ore? very pretty. thanks for showing. rebecca Bristol, Connecticut, Butte, Montana, Arizona in the USA Cornwall, England Rhineland, Germany Tsumeb, Namibia South Africa Morocco Bolivia Cant specifically say where mine are from, I dont know |
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Post by hydrogeologist on Jul 16, 2010 12:33:30 GMT -5
I've found bornite at a lot of copper mines up here in Maryland, but nothing that bright.
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Post by lauriesrocks on Jul 17, 2010 11:00:02 GMT -5
Bornite is also found here in North Carolina, in very good pieces from the Holloway Mine in the Virgilina District and rarely in superb specimens from the Hanson quarry in Rougemont, Durham County. (I have examples for sale from both sites if anyone is interested)
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