925 silver pendant. Pendant Size - 40 x 26 mm Weight - 8,43g Ammonite Fossil An ammonite can mean a spiral-shaped, fossilized shell of an extinct sea creature belonging to the Ammonoidea subclass of mollusks, a popular geological fossil and sometimes a gem in jewelry. The name comes from the Egyptian god Ammon, who was depicted with ram's horns, which the ammonite shell resembles. Item will be shipped by registered mail with tracking number.