A very rare and unusual specimen from Michigan's "Copper Country."  Everyone has seen the iconic copper in calcite specimens, but how often do you see copper in quartz?  This piece has sheet-like copper growths interspersed between quartz growths with varying degrees of crystallization, in some areas you can even see the copper inside the quartz crystals-- admittedly not the most finely crystalized-- but with the familiar copper gleam you would see in the included calcites. A very unusual piece!