This Specimen has been sold.
Here is a unique piece of jewelry featuring a real cut and polished ammonite fossil from Madagascar. The 1.25 inch wide ammonite approximately 110 million years old and from the genus Desmoceras.
Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. Ammonites appeared in the fossil record about 240 million years ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.