Pyrite with Quartz

Larrako Quarry, Barrio de Larrasko, Arrigorriaga, Comarca Gran Bilbao, Vizcaya / Bizkaia, Basque Country (Euskadi)  Spain

Specimen size: 3.2 × 2 × 1.5 cm = 1.26” × 0.79” × 0.59”
Main crystal size: 0.9 × 0.6 cm = 0.35” × 0.24”