Calcite on Aragonite and Sulfur

Cozzo Disi Mine, Casteltermini, Agrigento (Girgenti) Province, Sicily  Italy

Specimen size: 12.8 × 9.7 × 3.3 cm = 5.04” × 3.82” × 1.30”
Main crystal size: 4.2 × 4 cm = 1.65” × 1.57”