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NATIONAL GEOGRAPHIC Rock Tumbler Refill – 453g Mix of Rough Gemstone Rocks for Rock Polishers, Includes 5 Jewellery Fastenings and Rock Polishing Grit, Works with All Rock Tumblers – TopToy
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Amazon.com: NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, and Detailed Learning Guide - Great STEM Science Kit for Geology Enthusiasts : Toys & Games
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