3435 Ferro-glaucophane, Muscovite (Var: Phengite), Groix, Lorient, Morbihan, Brittany, France March 12, 2023 James Melville Europe France Ferro-glaucophane, Muscovite (Var: Phengite) – Groix, Lorient, Morbihan, Brittany, France. Specimen measures 40x23x12mm.