Baroque Drop Ammonite Pendant With Red Coral Inlay & Sterling Silver Bezel. This pendant is great for everyday wear, crafted in sterling silver, it features an ammonite inlayed with red coral in a baroque drop style. Ammonites are fossils of shelled cephalopods that lived 200 million years ago, most of them going extinct at the end of the Cretaceous Period, when most of the non-avian dinosaurs also went extinct.