Dolomite

Asturreta Quarry, Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (1959)

Specimen size: 6.9 × 4.4 × 2.7 cm = 2.72” × 1.73” × 1.06”
Main crystal size: 3.4 × 3.3 cm = 1.34” × 1.30”