Acanthite on Calcite

Monte Narba Mine, San Vito, Narba Mountain, Sud Sardegna Province, Sardinia/Sardegna  Italy

Specimen size: 5.1 × 3.7 × 1.2 cm = 2.01” × 1.46” × 0.47”
Main crystal size: 0.5 × 0.4 cm = 0.20” × 0.16”