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Beautiful gemstones are polished, smoothed, and shaped by their existence in nature and being tumbled through a rivers-a process that usually takes
Kids Rock Tumbler Set
in Rock Tumblers.
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Learning Guide, Great Stem Science Kit
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Product Description Introduce your child to the exciting world of rock tumbling with the Tumble Tech rock tumbler kit. This complete set includes
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