JFD182AP2: The great classics are always great classics!
Even though it is not a top piece, more than anything because of the size of the crystal, it is a Dolomite from 'el pozo' in matrix, undamaged, twinned and has that special 'light', that transparency and luster of the best dolomites from Eugui, those of 'el pozo'
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (±1972)

Specimen size: 6.4 × 4.2 × 4.4 cm = 2.52” × 1.65” × 1.73”

Main crystal size: 3.4 × 3.3 cm = 1.34” × 1.30”