The Thames & Kosmos Rock Tumbler

This rock polishing kit includes natural rock samples such as tiger's eye and rose quartz, four polishing grits, and jewelry settings for turning finished finds into wearable treasures. Follow the polishing process and watch rough surfaces give way to a smoother finish, then choose a favorite stone for an accessory with a story behind it.

A durable motor, noise-reducing barrel, and built-in timer with up to seven days of operation help keep the tumbling process moving. The rock tumbler features a USB-C power supply and a 450g capacity. Designed for ages 8 and up, it's a hands-on geology kit for budding rock collectors, curious scientists, and creative makers.


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