A nice piece of Hexagonaria coral from Alpena, Michigan. This is a colonial rugose coral with 6 sided corallites. It's Devonian aged and about 365 million years old.
Michigan's state stone is commonly called a Petoskey stone as many beach worn specimens can be found near Petoskey, MI
#FossilFriday
Nothing says “dying civilization” like gladiator fights at the capitol for the emperor’s amusement.