Lewisian Gneiss, up to 3 billion years old, and the only documented "magical rock".
I made that last one up.
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Image Credit: Chris Bickerton
Posted by postman
12th August 2016ce
Edited 12th August 2016ce |
NB: Unless otherwise stated, this image is protected under the copyright of the original poster and may not be re-used without permission.
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