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Petoskey Stone Facts, Information and Description
Petoskey stone is a fossilized coral, the state stone of Michigan and is commonly found along the shores of Lake Michigan and Lake Huron in the United States.
Petoskey stone is a greenish to grayish to brownish fossilized coral from Petoskey, Michigan. Cabochons of this material show a distinctive cell-like appearance.
Specific Gravity -- 2.71-2.94.
aka Agatized Coral, Fossil Agate Coral, Fossilized Agatized Coral, Fossil Coral, Fossilized Coral, Petoskey Agate, Petoskey Stone
Agatized fossil coral is scientifically identified as a "chalcedony pseudomorph after coral.
 See also: Jewel, Jewelry, Fossilized, Crystal, Coral
  
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