Hobby Rock Tumbler

Turn rough rocks into beautiful polished gemstones with our high-quality rock tumblers. These powerful tumbling machines are perfect for beginners and

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BENTISM Rock Tumbler Kit, Hobby Edition Includes Rough Gemstones with Durable 3 lb. Barrel, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher, black

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