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Amazon.com: Polly Plastics Rock Tumbler Media Grit Refill, 2 lb Medium 180/220 Silicon Carbide Grit, Stage 2 for Tumbling Stones (2 Pack) : Toys & Games
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Amazon.com: NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Learning Guide, Great Stem Science Kit : Toys & Games
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Amazon.com: Polly Plastics Rock Tumbler Media Grit Refill, 2 lb Medium 180/220 Silicon Carbide Grit, Stage 2 for Tumbling Stones (2 Pack) : Toys & Games
![Amazon.com: NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Learning Guide, Great Stem Science Kit : Toys & Games Amazon.com: NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Learning Guide, Great Stem Science Kit : Toys & Games](https://m.media-amazon.com/images/I/81nhNgCmiEL._AC_SL1500_.jpg)