Each box will vary in color and fossil design as they are made from a natural material. These gorgeous boxes can be used for jewelry, keys, collectables, and more. Make a statement with these boxes. These are made with Ammonite and Orthoceras. Ammonite are an extinct shelled cephalopod and Orthoceras are an extinct nautiloid cephalopod. Look at the distinct Orthoceras on the top of the box and see ammonite pieces throughout the design. Wow people with this incredible gift and your knowledge of the fossils it is made with.