Marie's favorite components include ammonites. Ammonite fossils are 66-450 million years old, they were a shelled cephalopod. Most died out at the end of the Cretaceous Period when an asteroid collided with Earth. Ammonites come in all sizes, as tiny as a pinky nail and larger than a human. Ammonite fossils are formed when the remains or traces of the animal became buried in sediment which later solidified into rock. These fossils, now rocks, all look incredibly different based on the contents of the
sediment and minerals around them. Each one feels like a unique work of
art on its own.