Iridescent Deschaesites & Aconeceras Ammonites

This a gorgeous, natural association of a large Deshayesites and Aconeceras ammonite from the Volga River in Russia. Both ammonites have a iridescent, mother-of-pearl shell and display nicely in the sculpted concretion. The base of the rock has been cut flat to create a very aesthetic, free-standing display.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.

More about ammonites