An aesthetic copper specimen from recent finds at the Fengjiashan Mine of China. The sculptural, arborescent copper crystal cluster consists of prominent, flattened, spinel-twinned crystals at the extremities and tetrahexahedrons in the interior. The patina on this fine, two-sided piece varies from a rich coppery tone (probably with some cuprite, too) to a mottled look and many of the crystals have striking iridescence. This artistic piece looks like a sea fan. A finely crystallized copper specimen.