This Specimen has been sold.
Iridescent Ammonite Fossils Mounted In Shale - 6.5x3.7"
This is a spectacular display piece featuring five iridescent ammonite fossils from the Saratov Region of Russia. These ammonites are Middle Jurassic (Upper Callovian Stage) or approximately 161-164 million years old. There is one 2.2" wide Vertumniceras ammonites, two 1.7" and .9" wide Quenstedticeras ammonites, along with two 1.3" and 1" wide Eboraciceras ammonite. All of which has been aesthetically mounted in a piece of shale along with two interesting pyrite formations. The ammonite fossils are entirely real and natural, they have just been mounted in the rock.
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. True ammonites appeared in the fossil record about 240 million years ago. The last lineages disappeared 65 million years ago at the end of the Cretaceous.