Best Types of Rocks for Tumbling in a Rock Tumbler

May 31, 2014 - What types of rock can be used to make polished stones in a rock tumbler? And, just as important - what types of rock do not perform well in a rock tumbler.

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This refill pack contains a mixture of semi precious jasper from around the world. Your young scientist will have a blast running these pieces through the rock tumbler (sold separately) to transform them from rough rocks into polished gems! This set includes jewelry settings so they can create their own ring, earrings and necklace with the shiny stones.

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