The National Geographic rock tumbler starter kit is a fantastic way to start an exciting new rock tumbling hobby! This kit has all the features and accessories you'll need to transform rough rocks into extraordinary gemstones. Start an awesome rock collection, or create beautiful jewellery with the included jewellery fastenings. From the leakproof tumbling barrel to the four-stage grit polishing system, to the half pound of rough rocks, you'll be all set! Five jewellery fastenings let you make beautiful pieces from your favourite stones and the easy-to-follow instructions help you become a rock tumbling expert in no time