4D27: Group of very sharp, colorless, transparent and shiny rhombohedral Dolomite crystals with sharp interpenetration twins. A Spanish classic of excellent quality.
Asturreta Quarry, 'el pozo', Eugui, Esteríbar, Comarca Auñamendi, Chartered Community of Navarre (Navarre)  Spain (1970)

Specimen size: 12.0 × 10.3 cm = 4.72” × 4.06”

Main crystal size: 1,5 × 3.8 cm = 0.39” × 1.50”