I have just purchased 4 pieces of peacock ore from someone with a rock shop. My desire is to crush them into fine particles, then, sift through them and pick out the valuable specs using tweezers and a high-powered microscope.. I will do this one little piece at a time because I have understood that peacock ore contains about 67% copper. Eventually, I will put the recovered copper into a kiln and use flux to smelt into fine copper bars. My ultimate goal is to produce a few copper bars, about a pound each, with 99.95% purity. My first step will be to use a hard hand hammer to pound off a few bits. I will be using an impenetrable plastic wrapped around the piece so as not to waste any material that may go flying. I must use a towel to deaden the sound of my operation because I am at a town-house complex with no access to a workspace. I must do it in the basement. My question is, should I bother to shine up the tarnished, exposed spots of copper on the outside surface so the specks will show up better in the pan when I have ground enough stuff to look at?