Michigan Petoskey Stone
Petoskey Stones are fragments of a coral reef from about 350 million years ago during the Devonian period. They are found on many beaches of Lake Michigan and Lake Huron, as well as in rock quarries from Travers City to Alpena. These stones are a result of glaciation wherein ice sheets plucked the stones from the bedrock and ground off their rough edges. The word Petoskey is an English approximation of Bidasiga, which is a Native American Indian word that means ‘Rays of the Living Sun’.
Stones can range from 1 3/4″ to 2 1/4″ in size. The stone is polished on one side and rough on the other.