ncludes all of the Collections below: Fossils Collection, Igneous Rock Collection, Metamorphic Rock Collection, Mineral Collection, and Sedimentary Rock Collection. EI-5204 Fossils Collection. Hold a 70-million-year-old fossil in your hand! Set includes 9 fascinating fossils. EI-5205 Igneous Rock Collection. Igneous rocks are produced by hot volcanic magma action. Set includes 12 exotic rock specimens. EI-5206 Metamorphic Rock Collection. Metamorphic rocks are transformed by intense heat and pressure. Set includes 12 specimens. EI-5207 Mineral Collection. Minerals combine with each other to make rocks. Set includes 12 specimens. EI-5208 Sedimentary Rock Collection Centuries in the making, sedimentary rocks are formed by layers of deposited matter. Set includes 12 specimens.