Dolomite

Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain

Specimen size: 6.2 × 5.8 × 4.5 cm = 2.44” × 2.28” × 1.77”
Main crystal size: 4 × 3 cm = 1.57” × 1.18”