Small Polished Petoskey Stones (Fossil Coral)

 
These are small fossil coral (Hexagonaria percarinata) specimens from Michigan. They have been polished to a glossy finish on one side which really allows for the detailed structures of the coral head to be seen.

The photos are representative of the specimens you will receive but don't picture the exact ones. They vary in exact shape and patterning, though they all range from 1 to 1.5" wide.

Known locally as "petoskey stones" this fossil coral can be found along the beaches of Lake Michigan, 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.
FOR SALE
$7
4 Available
Quantity Discounts
3 to 9 Pieces
$6
10+ Pieces
$5
DETAILS
FOSSIL SPECIES
Hexagonaria percarinata
AGE
Middle Devonian
FORMATION
Gravel Point Formation
LOCATION
Michigan
SIZE
1 to 1.5" wide