How to Pick the Perfect Petoskey Stone

Learn how to tell a quality Petoskey stone from an inferior Petoskey stone. Don’t waste time polishing Petoskey stones that are poor quality. I’ll show you examples of what to look for and what to avoid.

The Petoskey stone is the state stone of Michigan. It is an approximately 350 million year old fossil called hexagonaria from the Devonian period. It is made of limestone or calcite which is about 3 on the Mohs scale of mineral hardness. This makes it easy to polish by hand with sandpaper. Of course you can use lapidary equipment to polish them too.

I buy most of my lapidary supplies from The Rock Shed. I don’t make money from your purchases there, but I really think they have the best prices and the best service, so I feel good recommending them.

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On Michigan Rocks you can join me on relaxing rock hunts in picturesque Michigan. I’ll also show you how to polish rocks and teach you other lapidary techniques. New videos are posted every Tuesday and Friday. Subscribe now so you don’t miss any upcoming videos!

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