This rock tumbler is the real thing! Light duty rock tumbler actually changes rough stones to beautiful high-luster semi-precious gemstones. You can even make jewelry and key chains with the settings included in this set. Set includes rotary tumbling machine , rough semi-precious stones (including amethyst, jasper, agate, and others), grit, polish, jewelry settings, glue, and instruction manual. Ages 10 and Up. U.L. Listed.

Great little tumbler for kids to learn about mechanical "weathering" (polishing) of rocks. Just like in a stream the rocks are rolled over and over in a grinding powder. In a stream or river the grit would be sand and fine dirts and clays. In this kit the grit and polish are provided. And it only takes about 6 weeks to polish the rocks unlike months and years in a stream!