CREATE BEAUTIFULLY POLISHED GEMSTONES by tumbling the 8 varieties of raw jasper in your National Geographic Rock Tumbler (sold separately)
1LB OF RAW GEMSTONES: Each refill kit comes with 1lb (453g) of rough rocks to keep you tumbling for weeks and weeks!
5 4 GRADES OF POLISHING GRIT: From coarse to fine, to incrementally refine your gems to perfection with each tumble.
CRAFT YOUR OWN UNIQUE JEWELLERY using the 5 included jewellery fastenings, and make stunning homemade gifts for your friends and family!
FULL-COLOUR LEARNING GUIDE with cool facts about the gemstones included, and easy to follow rock tumbling instructions.