Petoskey Stones Are Amazing Coral Fossils and Here’s How to Find One

Difference between a polished and unpolished/dry Petoskey stone. Photo: Larry & Teddy Page
The best places to find a Petoskey stone are along the beaches and sand dunes of Lake Michigan, especially in the northwestern and northeastern parts of the lower peninsula. The movement of the frozen lake ice during winter exposes new stones at the water’s edge each spring. Some of the most popular beaches for finding Petoskey stones are:

Petoskey State Park
Magnus City Park Beach
Zorn Park Beach
Fisherman’s Island State Park
Wilderness State Park