"Learn about the exciting hobby of rock tumbling with National Geographic. This set includes everything you need including two bonus rough gemstone refill packs (Jasper Mix and Variety). Rock tumbling is tons of fun and a great way to start an extraordinary rock collection. Kids can use the included jewelry fastenings to create beautiful homemade jewelry!"--Amazon.com.

Make any stone sparkle and polish everyday rocks into dazzling gemstones. Enhance your rock collection or start a new one! Kit contains tumbler, four polishing grits, a sifter, a full-color learning guide and REAL rough gemstones. For all skill levels; plug it in and polishing begins.

Spark an interest in geology, polish your collected rocks, or explore new crafting avenues by tumbling rocks. Kit contains a rock tumbling machine with 1 lb capacity barrel, 4 stages of grits, rock strainer, and instruction manual. Rocks not included.