full title: NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit – Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings and Detailed Learning Guide – Great STEM Science Kit for Mineralogy and Geology Enthusiasts

4.3 out of 5 stars via 3,468 ratings

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MAKE ANY STONE SPARKLE – Polish everyday rocks into dazzling gemstones

ENHANCE YOUR ROCK COLLECTION – Or start a new one! Makes all rocks shine like professionally polished stones

EVERYTHING IS INCLUDED – This kit includes the tumbler, four polishing grits, sifter, learning guide PLUS nine types of real rough gemstones

see details on amazon

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