Looking Into a Petoskey Stone by Robert Kelch, M.D.

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This is Michigan’s Official State Stone, the Petoskey, Hexagonaria percarinata. This particular stone was polished and then I photographed it with my Canon EOS 6D camera with a Sigma 70mm macro lens. Petoskey stones were colonial corals that lived in the Devonian Period – 355 to 415 million years ago.

Bob Kelch is a retired pediatrician and health care administrator who now has the time he wants to devote to his passion, photography. He lives near the Lake Michigan shore in South Haven, Michigan.

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  • Kenneth Keifer
    Kenneth Keiferover 1 year ago

    Very nice! I looked for one of those last summer but could not find any. Amazing detail! Thanks for sharing!

  • Thank you. We find several Petoskey stones each year, but they are not common on our beach in South Haven. They are much more commonly found further north along the Lake Michigan shore.

    – Robert Kelch, M.D.

  • dgscotland
    dgscotlandover 1 year ago

    Interesting capture here Robert.

  • Lynn Gedeon
    Lynn Gedeonover 1 year ago

    Nice patterns!

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