How to Hand Polish a Petoskey Stone

Learn how to hand polish a Petoskey stone without any expensive machinery.

The Petoskey stone (Hexagonaria percarinata) is an approximately 360 million old fossilized coral. It is the state stone of Michigan. Petoskey stones are calcite which is very soft, approximately 3 on the Mohs scale.

If you have a tumbler, you can save a lot of time by doing the first couple stages in the tumbler and then hand polishing to finish them up. youtu.be/IBRq7dPD0Lk

Another video of me collecting Petoskey stones and pudding stones in Lake Huron:
youtu.be/VfSquWyyRKI

This is a good place to buy aluminum oxide polish:
rockshed.com/rock-shop/rock-tumblers-supplies/r…

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Kingsley North is a lapidary store in Michigan's U.P. They make a great cab machine and sell many other brands too. They have a huge selection rough rock, tumblers, grit, jewelry supplies etc. at good prices. I buy most of my coarse grit from here in 45 lb. bags. It's the best price I have found. If you buy using the following link, I make a small commission.
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This is the cabbing machine I use:
kingsleynorth.com/kingsley-north-cabber-6-nova.…

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I buy a lot of lapidary supplies from The Rock Shed. I don't make money from your purchases there, but they have good prices and good service. This is where I buy my finer grits and polish.
rockshed.com

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