This Specimen has been sold.
Brilliant Agatized Sliced and Polished Ammonite (Pair)
Here is a beautiful and exotic 5.7 inch cut and polished Cleoniceras ammonite pair fromMadagascar. It exhibits gorgeous mineralization within the chambers with white calcite septa (divisions) separating them. This large, highly polished ammonite makes a great 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.