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Amazon.com: NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 3 lbs. Rough Madagascar Rocks for Tumbling including Unpolished Jasper and Quartz - Rock Tumbler Supplies include Rock Tumbler Grit & Jewelry Accessories :
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Amazon.com: Dan&Darci Mega Rock Tumbler Refill Kit - 9 Varieties of Gems - 0.5 lb, 4 Grit Levels, Jewelry Fasteners, Compatible with All Tumblers Rock Tumbling Supplies : Toys & Games
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Amazon.com: NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 1 Lb. Jasper Rocks for Tumbling - 8 Varieties including Mookaite and Kabamba - Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories : Toys & Games
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National Geographic Rough Gemstones Refill Pack for Rock Tumblers — Brainfuel Toys | Educational STEM Toys for Kids, Parents, & Teachers
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Amazon.com: NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1 Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories :
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