Well Preserved 3.8" Stephanoceras Ammonite

This is a very 3d, 3.8" Stephanoceras collected near Anwill, Switzerland. The matrix surrounding it has been sculpted to create an aesthetic, free-standing display. The ammonite is fully inflated with very nice surface detail including the distinctive ridges and nodes with no crushing. The genus Stephanoceras is commonly used as a index fossil to help identify the Bajocian Stage of the Middle Jurassic, approximately 164-170 million years old.