Super, exceptionally sharply crystallized copper. This specimen seems to me to be a single spinel-law twinned copper crystal with small crystals and crystal aggregates branching off of it, but there is so much going on  with this one that it’s hard to discern whether it is a single twin or some form of parallel growth development. Nice combination of coppery colour and red cuprite coating. With magnification, the sharp crystallization on this specimen is stunning!