Do in 30 days what it takes nature thousands of years to do! Transform rough stones into semi-precious shiny ones ideal for jewelry and other projects. Patience will reward you with your own glistening treasures. Includes: Rock Tumbler machine, rough semi precious stones, grit, polish, jewelry settings, and glue. Detailed instructions included. | Group Sales National Toy & Gift | | Classic Crafts Rock Tumbler Classic | Best Buy