Calcite with Dolomite

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

Specimen size: 14 × 10.8 × 7 cm = 5.51” × 4.25” × 2.76”
Main crystal size: 3.9 × 3.1 cm = 1.54” × 1.22”