Pyrite with Calcite

Moscona Mine, El Llano, Solís, Corvera de Asturias, Comarca Avilés, Principality of Asturias (Asturias)  Spain (1978)

Specimen size: 5.9 × 4.4 × 4.4 cm = 2.32” × 1.73” × 1.73”