3 1/4 Inch Flashy Red Iridescent Ammonite

Photos don't do this 110 million year old ammonite fossil justice. It shines with brilliant iridescent red hues when the light hits it from certain angles.

Most of the ammonites with this type of iridescence are quite small, this one is pretty good sized at 3 1/4 inches in diameter.

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
Cleoniceras besairei
Ambatolafia, Mahajanga Province, Madagascar
3.25 inch wide
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