What is this ?

[lmentzel]

Detecting in NC. Another cool find. But what is it? Copper for sure. I put it in lemon juice and it started shining right up.

 

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[DizzyDigger]

Looks a bit like a rosette off a horse bridal..

 

[cudamark]

Looks like part of a medal missing the ribbon and maybe a pin bar.

 

[Professor of Engineering]

Perhaps part of a belt or jewelry with a ribbon or leather piece.