Dolomite after Calcite and with Pyrite

Niccioleta Mine, Massa Marittima, Grosseto Province, Tuscany  Italy

Specimen size: 13.5 × 8.2 × 7 cm = 5.31” × 3.23” × 2.76”
Main crystal size: 12.3 × 4 cm = 4.84” × 1.57”