This Specimen has been sold.
Stunning 3.4 Inch Split Ammonite (Pair)
Here is a beautiful cut and polished Cleoniceras from the Cretaceous of Madagascar. It exhibits gorgeous mineralization within the chambers, each separated with white calcite scepta (divisions). The reverse side shows the the oak leaf suture pattern so distinctive of this species. This highly polished, exotic ammonite makes a superb display piece with tremendous historical appeal.
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.