Classic136 - Chalcocite on Chalcopyrite on Quartz - Cornwall, England, United Kingdom

This is a fine specimen of large chalcocite-coated intergrown chalcopyrite crystals and quartz on a massive sulfide matrix. The chalcopyrite crystals measure to 2.2 cm. A couple slightly damaged quartz points but otherwise fine. I believe this specimen is probably from the Liskeard district, but there is no documentation. 8.4 x 8.3 x 5.1 cm.