Calcite with Dolomite

La Florida mining area, Herrería-Valdáliga-Rionansa, Comarca Costa Occidental/Saja-Nansa, Cantabria  Spain (±2000)

Specimen size: 8.8 × 6.2 × 2.4 cm = 3.46” × 2.44” × 0.94”
Main crystal size: 4.1 × 2.7 cm = 1.61” × 1.06”