The Original Rock Tumbler Refill

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With rock tumbler refills handy, you're always prepared to smooth rough stones into beautiful, high luster gemstones. Replacement grit, polish, and even more gemstones are in included to roll, buff, and shine your own beautiful gems.

Museum Story

The Smithsonian's National Museum of Natural History is the world's preeminent museum and research complex dedicated to inspiring curiosity, discovery, and learning about the natural world through its unparalleled research, collections, exhibitions and educational outreach programs. The Janet Annenberg Hooker Hall of Geology, Gems, and Minerals houses the vast National Gem Collection.


  • Kit includes: 8 oz. of precious stones, .63 oz. of coarse grit, .81 oz. of polish, 1.02 of medium grit, .17 oz. of white glue
  • Made in China