What causes the rainbow effect or toning on coins especially pennies? I’ve found newer dated coins like this more often post 1980 to present. Any way pretty show me some of your coing with this or with similar qualities. Ps the pics above are not mine I did not feel like digging out mine. Thx
I've made toned coins - Take a pair of pliers and hold them over a gas burner. It is fast and fairly easy (just don't get burned ). Some can be album toned, and those usually have beautiful bullseyes on them. Here's one I made.
