Create beautifully polished gemstones by tumbling the 9 varieties of raw stones in your National Geographic rock tumbler.
 Includes 1lb (453g) to keep you tumbling for weeks and weeks. Refill pack includes a full-colour learning guide with cool facts about the gemstones, easy to follow rock tumbling instructions, grit refills and additional jewellery fastenings.
Choose from Agate mix or Jasper mix