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Orthoceras Fossil
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Orthoceras Fossil, from Morocco. 9.5" x 4" diameter. https://en.wikipedia.org/wiki/Orthoceras
A fossil Orthoceras is the remains of an extinct straight-shelled nautiloid cephalopod from the Ordovician period (about 488-443 million years ago), characterized by its long, conical shell with internal chambers (septa) that were used for buoyancy. These fossils are found worldwide, especially in limestone deposits in places like Morocco, and are valued for their aesthetic appeal, with many being polished to reveal the intricate internal structure of the shell.
Donated By From the Mines: Tucson Gem Show