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NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings and Detailed Learning Guide - Walmart.com
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Amazon.com: NATIONAL GEOGRAPHIC Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults : Toys & Games
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Amazon.com: MJR Tumblers Single Barrel Rock Tumbler - Rock Polisher Machine, Tumbling Equipment for Stone, Glass, and Metal Collection, Polishing Tool for Adults & Kids, 15 lb : Toys & Games
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Amazon.com: MJR Tumblers Single Barrel Rock Tumbler - Rock Polisher Machine, Tumbling Equipment for Stone, Glass, and Metal Collection, Polishing Tool for Adults & Kids, 10 lb : Toys & Games
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Amazon.com: Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Gift for Kids All
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