Petoskey Stone

A rock often used for lapidary and fashioned into jewellery items, it is composed of a fossil coral, the devonian-age (350 million year old) Hexagonaria percarinata. It is found in the northern part of Michigan.

In 1965 it was named the State Stone of Michigan.
Photos of natural/un-cut material from mindat.org
Further Information
Mineral information:Petoskey Stone information at mindat.org
Significant Gem Localities
Canada
 
  • Qu├ębec
    • Capitale-Nationale
      • Charlevoix RCM
        • Saint-Urbain
Gems and Minerals of America- Jay Ellis Ransom-1974
USA
 
  • Michigan
    • Charlevoix Co.
      • Charlevoix
Field observation by Paul Brandes.
Gems and Minerals of America- Jay Ellis Ransom-1974
    • Crawford Co.
      • Frederic
Paul Brandes
    • Emmet Co.
Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Mineralogy of Michigan (2004) Heinrich & Robinson
Gems and Minerals of America- Jay Ellis Ransom-1974
Gems and Minerals of America-Jay Ellis Ransom-1974
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