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Author Topic: Found a rock on my property in Colorado, can someone help ID it?  (Read 142 times)

Offline James Harville

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I have attached two pictures.  I am thinking somewhere between quartz, plagioclase, maybe a feldspar? 

It absolutely scratches glass.  I was as high up as 6000 feet on my property in Colorado.  It has a dark/blue purple hue to it in some places.

Thank you!


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