🪨 Petoskey Stone
Michigan's state stone. Fossilized coral (Hexagonaria percarinata) from the Devonian period, found along Lake Michigan beaches.
Best Places to Find Petoskey Stone
Petoskey Stone Beaches
Petoskey, Michigan · Public Beach
Lake Michigan beaches from Petoskey to Charlevoix for Petoskey stones — fossilized coral with distinctive hexagonal pattern (Michigan's state stone).
Rockport State Recreation Area
Alpena, Michigan · state-recreation-area
Former limestone quarry turned state recreation area on Lake Huron. One of the best Devonian fossil hunting grounds in the Great Lakes — Favosites hon...
Fisherman's Island State Park
Charlevoix, Michigan · State Park
Lake Michigan shoreline park near Charlevoix with excellent Petoskey stone and Charlevoix stone hunting. The beach gravels are rich with fossilized co...