Hypnotic Gems Gallery: Orthoceras Sculpture Display Specimens - 7.5" to 8.5" Natural Polished Superior Grade Fossils - Collecting, Display Specimens, Curio Cabinets, Fireplace Mantles, and Education 100% Authentic Polished Orthoceras Fossils Average Height: 7.5" to 8.5" These orthoceras are nearly 500 million years old! Each and every fossil is unique and you will receive a piece similar to the image shown! Includes only authentic Hypnotic Gems certified fossils!