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Petoskey Stones (Where to Find Them in Michigan) | Rock-Hunting Guide

Petoskey Stones on a Michigan beach
Photo by Kathleen Smith/Frankfort Moments

Guide to Petoskey Stones (and Charlevoix Stones, too)

How to Find Petoskey Stones

Michigan’s state stone, the Petoskey stone and its lesser-known cousin, the Charlevoix stone are favored unique treasures for beach-goers. Though elusive and sometimes tricky to find, these stones remain a beloved symbol of our Great Lakes and the magnificent shores along them.

Luckily, the shores of Michigan are vast.

From well-known spots like Charlevoix and the Leelanau Peninsula, where the beaches are scattered with these fossils to quieter places like Lexington on Michigan’s blue thumb coast, there are many Petoskey stones still waiting to be found.

So how do you find the elusive Petoskey stone?

Petoskey Stones
Photo by Kathleen Smith/Frankfort Moments

What is a Petoskey Stone?

About 350 million years ago, Michigan was actually located near the equator, and a warm, shallow, tropical sea covered the land. Here, massive colonies of rugose coral (hexagonaria percarinata) thrived in reefs. It is the fossils of these corals that make a Petoskey stone.

Petoskey stones are unique rocks that sport a tightly-packed hexagonal pattern all over their surface. This pattern is the fossilized pattern of the prehistoric rugose corals.

Each hexagon on a Petoskey stone was once a coral polyp and the dark center of each one was once the mouth, which used tentacles to feed the coral.

Petoskey Stone in water

Tips for Finding Petoskey Stones

Know How to Identify a Petoskey Stone or a Charlevoix Stone

Petoskey stones and Charlevoix stones look a lot alike. Both are beautiful and great finds, but knowing the differences can ensure you get exactly what you’re looking for.

Though they are both fossilized corals from approximately the same time in history, there are subtle differences. The easiest way to tell the difference is that Charlevoix stones have a smaller hexagonal exoskeleton pattern compared to Petoskey stones.

Avoid the Sandy Beaches When Hunting Petoskey Stones

Michigan is home to many beautiful sandy beaches where people enjoy sunbathing and swimming. Leave those beaches to sun and fun and instead explore smaller, rockier beaches.

Additionally, you should know that Petoskey’s are not exclusive to the waterline, check the shore before the water and even in surrounding areas near uprooted trees or any other disrupted soil.

The average stone hunter won’t think to look in these lesser-known spots.

Charlevoix Stones
Photo by Kathleen Smith/Frankfort Moments

Look for Petoskey’s After Storms

Beachcombing after a storm is the best time if you’re looking for Petoskey stones. The patterns on Petoskey and Charlevoix stones are more easily seen when the rocks are wet, making rain your friend in this search.

Storms in particular are best though, because the wind and waves disrupt the sand and allow Petoskey stones to wash up on shore or surface from under the sand. Just be sure the sky is clear of lightning before heading out to the water.

Go Where People Don’t Go

Petoskey stones are no secret, and many people flock to beaches in hopes to collect some, which can make them hard to find. I like Petoskey hunting on the rocky beaches north of Alpena.

This doesn’t necessarily mean you need to discover some new secret spot, though.

Instead, simply moving down the beach away from areas near parking lots and beach access points can benefit your search, since these areas are less likely to have been picked over by other beachgoers.

petoskey stones in Michigan
Photo by Kathleen Smith/Frankfort Moments

Where There’s One, There Are Probably More

They are often found in clusters. If you find one, keep looking; you may be able to take home a few, just be careful not to take too many.

Be mindful of other fossil-hunters and the Michigan beach environment. Allow others to enjoy the beauty of Michigan’s beaches and the joy of finding their own treasure in the Petoskey stone.

Know the Laws

The state laws say you cannot collect more than 25lbs of stones, minerals, or fossils per year from Michigan beaches. This is a state-wide law, but each beach or state park will have their own policies.

These regulations can include the collection of Petoskey’s, Charlevoix stones, or other matter from the beaches, so be sure to check the local laws or park policies before taking home a souvenir.

Michigan fossils including Petoskey Stones and Leland Blues
Photo by Kathleen Smith/Frankfort Moments

Where to Find Petoskey Stones

As the name suggests, Petoskey is a popular destination for rock-hunters looking for the state stone. The beaches of Charlevoix are also popular, but you’re still more likely to find a Petoskey stone, since Charlevoix stones are the rarer of the two.

These stones are not limited to their namesake locations, however, and appear in many places along the northern Lake Michigan shore.

Here are some of the best locations for finding Petoskey or Charlevoix stones:


  • Mt. McSauba Beach
  • Lake Michigan Beach
  • Beaver Island
  • Fisherman’s Island State Park
  • North Point Nature Preserve


  • Petoskey State Park
  • Magnus City Park Beach
  • Bay Front & Sunset Park


  • Pt. Bestie Lighthouse

Leelanau County

  • Empire Beach
  • Leelanau State Park

Sleeping Bear Dunes National Lakeshore


  • Orchard Beach State Park

About the Author~

Bella DiMascio is a Content Editor for She grew up in the Detroit suburb of Westland and later attended Western Michigan University in Kalamazoo where she majored in Communication Studies and minored in English: Writing. Creative writing has been a hobby and interest of Bella’s since she was in elementary school and she is thrilled to be using her talents to highlight the Great Lakes State. Outside of writing, Bella enjoys getting outside with her two Australian Shepherds, playing video games, and binging shows on Netflix.

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