Dolomite

Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1970)

Specimen size: 9.5 × 8.1 × 6.7 cm = 3.74” × 3.19” × 2.64”
Main crystal size: 3.6 × 3.6 cm = 1.42” × 1.42”