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NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Learning Guide, Great Stem Science Kit - Walmart.com
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Amazon.com: NATIONAL GEOGRAPHIC Rocks, Fossils & Minerals Kit – 200+ Piece Set with Real Fossils, Rocks, Gemstones, Crystals & Much More, Plus Learn More with Absolute Expert: Rocks & Minerals Full-Color Book :
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