This rock tumbler is designed for young geologists ages 8 and up to polish rough stones into smooth, finished specimens. The durable motor and leak-proof, noise-reducing barrel ensure consistent operation, while a built-in timer allows tumbling cycles of up to seven days. The kit includes genuine rock samples such as amethyst, aventurine, and rose quartz, along with four polishing grits. Users can also polish collected rocks, glass, or wood. An educational manual and poster introduce key geology concepts like erosion, weathering, and the rock cycle. The tumbler has a 450g (over 1 pound) capacity and uses a USB-C power supply. Jewelry fasteners are included to turn polished stones into wearable accessories.