WHERE ON EARTH?
Weird and Dead Stuff

       

WHERE ON EARTH?
Weird and Dead Stuff

       

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Contents: Petoskey coral stones, Michigan

PETOSKEY STONES

THE ROCK THAT'S ACTUALLY A FOSSIL!

(Fossil coral, Hexagonaria percarinata)

This is fossil coral, with a beautiful honeycomb pattern, fairly soft at Mohs 3 on the hardness scale. Michigan's State Rock.  Antrim County MI holds a Petoskey Festival each year.  Formed when Michigan was covered by a sea in which coral reefs thrived,  the coral gradually became buried by sediment, which turned into limestone and shale.  The skeletons were replaced by calcite (calcium, carbon & oxygen).

During the Ice Ages, from 1.6 million to 10,000 years ago, glaciers scraping over Michigan broke up soft, fossil-bearing rocks.  The pieces were carried along and dropped, now found along lake beaches, road cuts, and gravel pits as rounded stones from pebble size to potato-sized lumps.  Dated to 350 million years old (Devonian period). Found on the shores of Little Traverse Bay from the northwestern tip of the Lower Peninsula, especially around Petoskey and Charlevoix, Michigan.

The name "Petoskey" comes from an Ottawa Indian chief.  When he was born, sunbeams fell upon his face so he was named Pe-tos-e-gay ("rising sun").  European settlers Anglicized the name as Petoskey.

 

SMALL - POLISHED PETOSKEY STONES

Fully (professionally) polished on one side, lightly polished on other side

1-1/4 to 1-5/8" average

$13.50 each



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MEDIUM - POLISHED PETOSKEY STONES

Fully (professionally) polished on one side, lightly polished on other side

1-3/4 to 2" average

$19.75 each





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LARGE - POLISHED PETOSKEY STONES

Fully (professionally) polished on one side, lightly polished on other side.

Measured as shown, individually priced



#F830-151
5.5 oz., oval; 2-1/2" wide x 1-3/4" high x 1-3/8" deep
$28  SOLD

 

EXTRA SMALL - UNPOLISHED PETOSKEY STONES

COATED WITH BABY OIL TO SHOW OFF THE PATTERN

1 to 1-1/4" average

$8 each



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SMALL - UNPOLISHED PETOSKEY STONES

COATED WITH BABY OIL TO SHOW OFF THE PATTERN

1-1/4 to 1-5/8" average

$10 each

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MEDIUM - UNPOLISHED PETOSKEY STONES

COATED WITH BABY OIL TO SHOW OFF THE PATTERN

1-3/4" to 1-7/8" average

$14 each



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LARGE - UNPOLISHED PETOSKEY STONES

COATED WITH BABY OIL TO SHOW OFF THE PATTERN

2" average

$18 each



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EXTRA LARGE - UNPOLISHED PETOSKEY STONES

COATED WITH BABY OIL TO SHOW OFF THE PATTERN

Priced as marked



#F-831-411
3-1/4" long x 2-1/2" wide x 1-1/2" thickest  $36

 

PETOSKEY STONES, LIGHTLY BUFFED & COATED

These specimens have been buffed and lightly coated with polyurethane to show off the pattern.

PRICED AS SHOWN

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#F-832-C  $20

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#F-832-D  $20

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#F832-K  $12

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#F-832-N  $12

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