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Posted in response to Unknown metallic rock. from Ward on February 22, 2012 at 00:05:28:

Re: Unknown metallic rock.

Hey Wayne,

It looks like quartz and mohawkite to me - a rare mixture of algodonite, arsenic-rich copper, and domeykite that's found only in Michigan.

Your specimen looks similar to some mohawkite images online:

http://www.mwminerals.com/m154_Mohawkite.html
http://www.mwminerals.com/m1094_Mohawkite_and_Quartz_Cabochon.html
http://topgems.homestead.com/Mohawkite.html
http://telaformosa.blogspot.com/2011/06/from-vault-mohawkite.html

Here's the Mindat page for it: http://www.mindat.org/min-2740.html

Hope this helps.

-AJ

From AJ - March 05, 2012 at 08:15:00

Message: 70226



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