1.73 Inch Desmoceras Ammonite Pair

Here is a beautiful 1.73 inch cut and polished Desmoceras ammonite pair from the Cretaceous of Madagascar. It exhibits gorgeous mineralization within the chambers, some of which are preserved as crystal lined pockets. The D shaped scepta (divisions) distinguish this from the much more commonly seen Cleoniceras ammonites. 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.

Artists reconstruction of an ammonite.  By Nobu Tamura
Artists reconstruction of an ammonite. By Nobu Tamura
Desmoceras latidorsatum
Ambatolafia, Mahajanga Province, Madagascar
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