National Geographic Rock Tumbler Hobby Edition STEM Kit New Sealed

National Geographic   Rock Tumbler Hobby Edition   STEM Kit   Brand New Sealed  National Geographic Rock Tumbler Hobby Edition STEM kit provides everything needed to transform rough rocks into polished gems. This high-quality tumbling machine features a heavy-duty motor, a built-in programmable timer, and a leak-proof rubber barrel designed to reduce noise during operation. The comprehensive set includes one pound of assorted rough gemstones, four stages of polishing grit, jewelry settings, and a detailed learning guide. Ideal for budding geologists and hobbyists, this educational kit offers a hands-on way to explore earth science while creating beautiful keepsakes. The box shows minor shelf wear but remains factory sealed.