Acanthite on Calcite

Balcoll Mine, Falset, Comarca Priorat, Tarragona, Catalonia / Catalunya  Spain

Specimen size: 3.7 × 2.5 × 2.2 cm = 1.46” × 0.98” × 0.87”
Main crystal size: 0.5 × 0.4 cm = 0.20” × 0.16”