Rock collectors in northern Michigan often find what they believe are Petoskey stones, only to later find out they are the lesser known Charlevoix stones — which can leave some disappointed that they ...

Even though they’re found in the Great Lakes, Petoskey stones are actually fossilized coral. You can tell a Petoskey stone by its honeycomb pattern (in fact, the word “hexagon” is part of the ...

Petoskey and Charlevoix stones are both fossilized coral from the Devonian Age, found in Michigan. Petoskey stones have a larger, more symmetrical hexagonal pattern than Charlevoix stones. With a few ...

Petoskey and Charlevoix stones are both fossilized coral from the Devonian Age, found in Michigan. Petoskey stones have a larger, more symmetrical hexagonal pattern than Charlevoix stones. Rock ...