Quartz after Calcite

La Viesca Mine, Reguerín II pocket, La Collada mining area, Huergo, Siero, Comarca Oviedo, Principality of Asturias (Asturias)  Spain (12/2001)

Specimen size: 11.5 × 9.5 × 5 cm = 4.53” × 3.74” × 1.97”