Andalusite (Var: Chiastolite)
Les Salles de Rohan, Sainte-Brigitte, Pontivy, Morbihan, Brittany, France
Chiastolite crystals (with typical inclusions of graphite microcrystals)in black schists(Paleozoic, lower Ordovician).
Dimensions of xls: length 2 to 3 cm, width 5 mm.
From the classic french locality, "Les salles de Rohan".
Trilobits fossils can be found in these very same schists.
© Jacques Malassé