Muscovite (Var: Phengite)

3435 Ferro-glaucophane, Muscovite (Var: Phengite), Groix, Lorient, Morbihan, Brittany, France

Ferro-glaucophane, Muscovite (Var: Phengite) – Groix, Lorient, Morbihan, Brittany, France. Specimen measures 40x23x12mm.