Calcite on Dolomite

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

Specimen size: 7.9 × 3.9 × 2 cm = 3.11” × 1.54” × 0.79”
Main crystal size: 2.1 × 2 cm = 0.83” × 0.79”