Dolomite

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

Specimen size: 6.2 × 3.8 × 3.8 cm = 2.44” × 1.50” × 1.50”
Main crystal size: 2.8 × 2.7 cm = 1.10” × 1.06”