To see more metamorphic rock related items, click here . Includes a key and rock cycle chart. For additional sedimentary rock related items, click here . It includes 6 minerals and 6 each of the three types of rock - igneous, metamorphic and sedimentary. Minerals are chemical compounds or elements found naturally in the crust of the earth.
Some minerals have a fixed chemical composition, while others are a series of related compounds.
Rocks are usually portions of large masses of material that make up the earth's crust. Most rocks contain several minerals. The key also includes a useful and interesting fact about a geologic feature found in each state. The removable specimens come in a nice display tray. This collection offers an exciting look at some of the most peculiar physical properties exhibited by minerals.