Great way to start a rock collection! Learn about the exciting hobby of rock tumbling with National Geographic. Learn all about the fascinating way rocks are polished in nature, how gemstones are used in jewelry, and much more in the full-color learning guide.
This expansive set contains a heavy-duty tumbling machine and a rubber tumbler barrel. A programmable timer ensures you get the perfect tumble time! You also get 1 pound of rough rocks to tumble, 5 jewelry settings, tumbling grit, and a detailed learning guide with instructions.