This Specimen has been sold.
1.7" Ammonite (Asteroceras) Fossil - Glows When Backlit!
This is a beautifully prepared, 1.7" wide Asteroceras obtusum ammonite fossil from the Lyme Regis region of England. The ammonite has been prepped mostly free from the rock, with a viewing window that has been sculpted from the limestone. Much of the shell is preserved as a translucent, yellow calcite. During preparation the rock has been removed from behind the ammonite so that it can be back-lit with a light source causing it to glow. Comes with an acrylic display stand.
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. The last lineages disappeared 65 million years ago at the end of the Cretaceous.