Copper (Spinel-Twinned)
Cabinet, 13.0 x 9.3 x 3.9 cm
Champion Mine, Painesdale, Houghton Co., Michigan, USA
Ex. Robert Nowakowski

This is a solid mass, composed almost completely by spinel-twinned copper crystals which reach over 3 cm in length. The surface patina is a rich brownish-red, natural and unburned by acid as usual; with the brighter red coloring probably due to a coating of cuprite. The specimen appears to be a floater, with part of the back side covered by microcrystals of a light tan-colored mineral, possibly calcite. Overall this is a more massive piece than one normally finds from Champion finds, heavy and with good impact and presence.