How does a rock tumbler work? Can any type of rock change into a bright color? Does the tumbler require chemicals?
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Rock tumblers use rotary motion to polish the rocks in a slurry of water and abrasive powder.
The abrasive powder comes in a variety of ‘grits’ to work from rough to smooth.
It just polishes the surface of the rocks to be smooth.
It mimics the natural weathering that occurs with water (rivers or tides) and sand to polish driftwood or shells.
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