Collection: Ammonite

Ammonite fossil is the petrified remains of an extinct marine mollusk that lived millions of years ago, thriving alongside the dinosaurs before vanishing during the Cretaceous-Paleogene extinction event. These fossils are instantly recognizable by their beautifully coiled, spiral shells, which resemble a tightly wound ram's horn—a characteristic that inspired their name, honoring the ancient Egyptian horned god Ammon. As the creature grew, it continuously built new, larger chambers onto its shell, living only in the outermost room while sealing off the older, smaller ones behind it. Over millennia, as these shells rested in seafloor sediment, mineral rich water seeped into the empty chambers, replacing the original organic material with stone, calcite, or sometimes even iridescent pyrite and ammolite. Today, ammonite fossils are highly prized by collectors and scientists alike, serving as vital "index fossils" that help geologists determine the precise age of the rock layers in which they are discovered.