Description

Ammonites are extinct marine creatures that belong to the class of cephalopod mollusks, which lived between about 400 and 66 million years ago, during the Palaeozoic and Mesozoic era. These animals had a spiral shell composed of sections separated by walls called septa. The shape of the shell could vary greatly between the different species of ammonites, but in general it presented a more or less narrow and elongated spiral, often with streaks and details that formed intricate geometric figures. The size of the shell could vary greatly, from a few hundred micrometers to about ten meters in diameter. Thanks to their beauty and scientific importance, today their shells have been collected and appreciated by palaeontology enthusiasts and collectors of minerals and fossils.