Cordierite (variety pinite)

Isserteaux, Clermont-Ferrand District, Puy-de-Dôme Department, Auvergne-Rhône-Alpes  France

Specimen size: 2.4 × 2 × 1.6 cm = 0.94” × 0.79” × 0.63”
Main crystal size: 1.4 × 0.7 cm = 0.55” × 0.28”