Gypsum

Pepita Mine (Mine entrance Alcanadre), Alcanadre, Comarca Rioja Media, La Rioja  Spain

Specimen size: 7.7 × 3.2 × 5.1 cm = 3.03” × 1.26” × 2.01”
Main crystal size: 2.6 × 1.8 cm = 1.02” × 0.71”