Mineraux - Petoskey stones - A fossil colonial coral, genus Hexagonana. Found in the lower peninsula

Mineraux - Petoskey stones - A fossil colonial coral, genus Hexagonana. Found in the lower peninsula of Michigan. Shown are wave polished stones, cut stones, and jewelery items made from them. Highly prized by lapidaries and collectors - Carte Neuve - CPM - Voir Scans Recto-Verso