Calcite (twinned)

Arambeltz Quarry, Ziordia (Ciordia), Comarca Barranca, Chartered Community of Navarre (Navarre)  Spain

Specimen size: 5.7 × 5 × 3.9 cm = 2.24” × 1.97” × 1.54”
Main crystal size: 3.2 × 2 cm = 1.26” × 0.79”