Sphalerite with Fluorite on Quartz

La Viesca Mine, La Collada mining area, Huergo, Siero, Comarca Oviedo, Principality of Asturias (Asturias)  Spain

Specimen size: 7.8 × 4.9 × 4 cm = 3.07” × 1.93” × 1.57”
Main crystal size: 1 × 1 cm = 0.39” × 0.39”