The Combo Bag is an Ol’ prospectors dream! The Combo Bag is a great variety of semi precious, precious gemstones AND fossils. Make education and learning fun at home by studying both, fossils and gemstones. An assortment of sedimentary, igneous and metamorphic rocks are contained along with numerous fossils. Gemstone and fossils size are similar to those pictured. There are assorted fossils in this bag as well.