This Specimen has been sold.
Agatized 4.4 Inch Polished Ammonite (Half)
This is an absolutely gorgeous (half) ammonite fossil which is Middle Cretaceous (110 MYA) from Madagascar. It is of the species Cleoniceras and has been cut in half and highly polished to reveal the spectacular inner chamber detail. The inner chambers have been agatized and some of them are preserved as crystal lined pockets. It is truly a spectacular piece of "natural art". These fossils come with an acrylic display stand and is approximately 4.4 inches wide.
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.