Quote Originally Posted by gustavus View Post
I'm surprised the copper has not precipitated into its elemental form. According to the electromotive series of metals your copper sulfate coming into contact with iron would have precipitated the copper out of solution back into pure copper as a beautiful red powder.
A while ago I picked up a metal tin when scrapping, inside it were several copper coloured silver coins & other coins.
I couldn't figure out the copper coloured silver coins till I read about this.



The copper coins had electroplated the silver coins by using the iron in the metal box, the box was outside & got filled with rain water.