Highlights Sparkling stone device Create a gemstone collection Tumbler Four polishing grits Real gemstones Do you love your gemstone collection, but feel like many of your precious stones could use with some loving? The Shiny Rocks STEM Polisher allows children to buff, polish, and enhance the natural beauty of their prized collection. There is also a good number of gemstones included in this kit, beyond the incredible polishing device. Simply insert your gemstones into the device along with…