I tumbled Petoskey stones and other fossils in a rotary tumbler as an experiment. I had some successes and some failures. I used different grits including a corn cob medium to do the sanding and then the polishing. Watch and see the results. #polishing #rockhounding #greatlakes #fossils #petoskey #favosites #tumbling #tumbler #polishing #chaincoral #deathplate

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