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Petoskey, Charlevoix stones turn up on Michigan beaches. How to tell them apart

Petoskey stones and Charlevoix stones both are formed by ancient corals, but you can tell them apart.

Petoskey stones and Charlevoix stones both are formed by ancient corals, but you can tell them apart.

2 months ago·Detroit, United States

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Detroit Free Press broke the news in Detroit, United States 2 months ago on Tuesday, August 26, 2025.

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