Instructions for how we polish Fluorite, Petoskey Stone and other similar soft stones
 

These instructions will work in both a rotary or vibrating tumbler.

 polished fluorite

Click on photo for larger image.

Step 1 - Load the tumbler with the recommended amount of rough Fluorite, add 120-220 grit and run until shaped nicely. This may take 12 or more hours in a vibrating tumbler or up to 30 to 48 hours in a rotary.  Check them frequently so that you don't grind the Fluorite all away.

Step 2 - Wash the tumbler barrel and Fluorite, put the nicely shaped pieces back in the tumbler barrel. Due to the rock that was ground away in Step 1 the barrel will not be full.  Add ceramic media to make up the difference for the rock that was ground away and run them in 500 Grit Aluminum Oxide for about 12 hours in a vibrating or 24 hours in a rotary tumbler.

Step 3 - Wash the tumbler barrel, Fluorite and ceramics and run them in 1000 Grit Aluminum Oxide wet for about 12 hours in a vibrating or 24 hours in a rotary tumbler.

Step 4 - Wash the tumbler barrel, Fluorite and ceramics. Remove the ceramics from the Fluorite and save them for the next time you them in Step 2.

Fill the tumbler barrel approximately 3/4 full of dry corn cob and add about 1 1/2 to 2 tablespoons of Aluminum Oxide polish per 1 lb of corn cob.

Note: this is a dry step, DO NOT add water. Divide the Fluorite into 2 or 3 batches (This is to insure that the rock being polished rotates with the corn cob and does not rub against itself). Add 1 batch of Fluorite to the tumbler with the corn cob and polish and run. It may take up to 48+ hours to bring them to a polish in a vibrating tumbler and 3 to 5 days or so in a rotary tumbler. Check them every now and then to see how they are doing.

 

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