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Fossil Coral var. 'Petoskey Stone'
Fossil Coral var. 'Petoskey Stone' Fossil Coral var. 'Petoskey Stone' Fossil Coral var. 'Petoskey Stone'
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Fossil Coral var. 'Petoskey Stone' (Ref: R978)

Little Traverse Bay, Michigan, USA
90mm x 70mm x 25mm
$200
Polished specimen of fossil coral known as 'Petoskey stone'. Petoskey stone is a fossilized, prehistoric coral (Hexagonaria percarinata) that formed around 350-400 million years ago. They are known for their unique six-sided, honeycomb-like pattern and are the official state stone of Michigan. This is a good sized example that is polished on top and natural on the bottom. Ex. Mike Keim.
Data last checked on 14th May 2026
From: Marin Minerals
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* price is an approximate conversion and may not be accurate.

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