Petoskey Stones - Michigan Vintage Postcard

Petoskey Stones
Back Information: A fossil colonial coral, genus Hexagonaria Unweathered specimens collected from gravel pits in Emmet County. May be found along the shores of Michigan’s lower peninsula, as well as in glacial drift throughout lower Michigan. Used for making jewelry and ornaments. 
Condition: Good
1960s
Mailed: Posted on 1968 from Mackinaw City, Michigan with a 5 cent George Washington stamp
Photograph
Publisher: Hiawatha Card Co.

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