This type of pseudomorph is exceedingly rare in nature. It is an old time specimen that was once part of the Koenig collection at the Seaman Museum at Michigan Tech. Sparkling modified cubes, to .50 cm across, of what was once cuprite, now exhibit the rich brown color of copper. Looking closely at the matrix affords the viewer with glimpses of native copper. This unusual specimen is further enhanced by its pedigree as if it wasn't enough to be originating in America's premier secondary copper deposit, Bisbee.