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Buy Advanced Professional Rock Tumbler Kit - with Digital 9-day timer and 3-speed settings - Turn Rough Rocks into Beautiful Gems, Great Science Kit & STEM Gift for all ages

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NATIONAL GEOGRAPHIC Professional Rock Tumbler Kit- Rock Polisher for Kids & Adults, Complete Rock Tumbler Kit with Durable Tumbler, Rocks, Grit, and Our New GemFoam Polisher, A Great STEM Science Kit

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