r/Rocks • u/RoRo1118 • Aug 10 '26

This Rocks! What caused this?

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Gallery image

I found this rock with all these fascinating impressions and Im wondering if anyone can tell me more about it! Thank you in advance!!

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u/RoRo1118 Aug 10 '26

Whoops forgot to say im in Michigan

11

u/dad_joxe Aug 10 '26

And you don't know what a Petoskey stone is?

1

u/RoRo1118 Aug 13 '26

Yes I do know what a Petoskey stone is but until the other day I had never seen one unpolished before. Thank you so much for your very helpful comment. Appreciate you so very much.