Hard Rock Quarry

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Cleaning Pennies In A Rock Tumbler
I use my rock tumblers to clean pennies. This works really good and makes the pennies shine almost like new. One bag of aquarium gravel, 2 quarts of pennies, 2 ounces of Palmolive dish soap, enough water to cover. Rotate for two hours and enjoy.
Look at those grimy suds - and we are just starting
Cleaning pennies in a rock tumbler - close up
Pennies - before and after