rock tumbler

Trusted by beginners and backed by experts, this electric tumbler has everything you need to start your rock tumbling journey. The KoolStone C1 Rock Tumbler is a classic model that balances reliable performance with all-in-one convenience. Turn rough rocks into polished gems, watching the stones change with each cycle.

A 2.5-pound capacity allows you to tumble more stones at one time, and this model is 75% quieter than most because it has a rubber outer coating rather than a plain plastic barrel. It has 3 speed controls (providing more granular tumbling results) and a 9-day timer (with automatic shutoff feature and memory function), all displayed on clear screen, letting you easily hone your settings for precise tumbling each time. 

The C1 Rock Tumbler includes everything you need to create polished gemstones: rock tumbler with 2.5-pound capacity rubber barrel, 1 pound of different types of rough gemstones, 3 belts, 4 polishing grits, ceramic contact media, sifter, jewelry fastenings, and an illustrated tutorial guide.