A Charlevoix stone (rock formed from skeletons of Favosite coral or honeycomb coral) found on the beach on Lake Michigan, USA.

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Photo credit: © Kirk Hewlett / Alamy / Afripics
License: Royalty Free
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Keywords: beach, charleviox, charlevoix, coral, favosite, formed, fossilized, great, lake, lakes, michigan, outdoors, rock, stone