Turn rocks into semi-precious gems with The Original Rock Tumbler. Collect rocks from family trips or various adventures and add them to this electric tumbler machine. You put them in dull and pull them out polished. Rocks transform into beautiful, smooth colors, shapes and sizes. Display the polished rocks in a special place or turn them into unique, homemade jewelry or décor pieces. The machine measures 5 x 5 x 8.5 inches. In addition to the tumbler, it includes semi-precious stones, grit, polish and instructions. The Original Rock Tumbler is a unique and special gift for the hobbiest and kids 10 and up alike.