Copper Replacement Agate

[bobert]

I found this on the beach in the Keweenaw Peninsula in Upper Michigan. It was polished down a little and examined under a microscope to verify copper. It is an extremely small amount of copper on the right side where the bands get darker but still a cool find. Specimen is about the size of a quarter.

 

[kcm]

Beautiful little piece!

 

[EricTheCat]

Awesome. You don't see many of those around. Did you use a detector to find it or just find it with your eyes?

 

[bobert]

I didn't use a detector, I was lucky to spot it with my eyes!