Large, 4.7" Polished Petoskey Stone (Fossil Coral) - Michigan

Large, Polished Petoskey Stone (Fossil Coral) - Michigan #271885

This is a large, 4.7" wide piece of fossil coral (Hexagonaria percarinata) from Michigan. It has been polished to a glossy finish on one side, while the rest of the piece has been left in a natural state.

Known locally as "petoskey stones", this fossil coral can be found along the beaches of Lake Michigan and Lake Huron, as well as in rock quarries from Alpena to Traverse City, Michigan. The species is Hexagonaria percarinata, a type of rugose coral that lived during the Middle Devonian period about 350 million years ago. Petoskey stones are the state stone of Michigan.

SPECIES

Hexagonaria percarinata

AGE

Middle Devonian

LOCATION

Michigan

FORMATION

Gravel Point Formation

SIZE

4.7" wide

Large, 4.7" Polished Petoskey Stone (Fossil Coral) - Michigan

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