Pyrite with Sphalerite

Niccioleta Mine, Massa Marittima, Grosseto Province, Tuscany  Italy

Specimen size: 13.3 × 8.7 × 8.3 cm = 5.24” × 3.43” × 3.27”
Main crystal size: 4.4 × 3.7 cm = 1.73” × 1.46”