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JohnG
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Unakite
Dec 3rd, 2016 at 10:32pm
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Here is a photo from my last rock hounding trip. I have been told this is unakite, and is very similar to the online specimens I have seen. I am curious as to what minerals make up this rock. Can anyone help me out, specifically the greens and reds. I have read this is a form of granite.
I should have a lot of fun making little rocks out of these big ones for the tumbler. thanks for looking.
John
  

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JohnG
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RockHoundLounger

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Re: Unakite
Reply #1 - Dec 3rd, 2016 at 10:40pm
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Another photo
  

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JoeM
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Re: Unakite
Reply #2 - Dec 4th, 2016 at 5:58pm
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Yes, I would like to see what that stuff looks like tumbled.
Correct, Unakite is a "morphed" granite. And there are many different formations of Unakite.
But this isn't one of them. Pic below of some different varieties of Unakite.

You probably found that rock somewhere in Stanley or surrounding counties because it's a good example of the
mixed up volcanic and pyroclastic rock of the slate belt.
Those green areas might have once been clumps of basalt in a rhyodacite ash-fall or ash-flow tuff.
And trying to identify and figure out all the rocks of the Slate Belt just gets "tuffer" from there.
The Piedmont of North Carolina has some very complicated geology.
It helps to read as much as possible about it.
Here's a link to a report that tried to identify some of the rock of the Slate Belt;
http://www.rla.unc.edu/Publications/pdf/ResRep25.pdf

and some unakite photographed wet,
happy hunting!


  

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JohnG
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Re: Unakite
Reply #3 - Dec 4th, 2016 at 9:24pm
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Thanks for the information. I found the rocks in Montgomery county which is next door to Stanly and definitely in the slate belt.
  
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