Michigan’s Upper Penninsula has the purest copper deposit in the world. In many cases it’s 100% pure native.
The mid continental rift event which occured over 1 billion years ago brought copper to the surface.
This crystal was freed from calcite and matrix using muriatic acid.
Gediegen Kupfer fehlt mir noch in meiner Sammlung 👍
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Oooh, lovely!
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Thanks! I can find pounds metal detecting at the abandoned mines.
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Nice! I've always wanted to visit the UP of Michigan. It's seems like it would be fascinating place geologically and culturally speaking. I write about geological topics as well! I'll give you a follow! :)
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