The PLANET XPLORE MARS DIG KIT from Kaper Kidz is an exciting way to explore the world of geology and gemstones. The kit comes with an mars-shaped plaster globe that measures approximately 7cm in diameter, which you can dig into to discover five hidden gemstones. The gemstones included in the kit are tektite, Voltic Hematite, Quartz, red Jasper, and a diamond-shaped stone. The digging process is made easy and fun with the wooden chisel and brush that come with the kit. As you dig out each gemstone, you can also learn more about it and its unique properties.