Conflicting signals investorshub.advfn.com/uimage/uploads/2017/6/7/ppotohui_jn7_10d_200_mucho_hist.jpg Versus : investorshub.advfn.com/uimage/uploads/2017/6/7/bnhddxx_jn7_3y_LOOKS_BAD_800.jpg investorshub.advfn.com/uimage/uploads/2017/6/7/jhuzucopper_jn7_1y_250_Supp_TL.jpg I believe that copper is a significant by-product of gold mining .