Copper Rock ?

My route for work has plenty of county dirt roads.
after winter road crews rebuild dirt roads with Rocks & clay sand .
On a stop I notice the classic copper oxide greenish color rock
after picking up I see the weight is nice for a 4 inch by 3/4 wide
rock . Yes it has rock like chip edges , there is nothing about it that says any thing but a rock except
1) it pings after getting hit
2) I rubbed hard on my pants and the copper shows with a shimmer



I can cut into it but first I want to see if I stumbled onto a copper rock ?? mixed in with road crew repair rocks
Evey thing say copper to me and the condition is natural formation
I feel a chunk of copper mixed with rocks still would show it's man made heritage
I'll get a picture to you