Fantasia Gallery: Medium Size Orthoceras Specimens on Rock - 8" to 10" Average - Polished Fossil Sculpture from Morocco - Premium Quality Specimens from The Gallery Collection Spectacular Orthoceras Plate from the Premium Fantasia Gallery Collection Average Size: 8" to 10" These fossils are nearly 500 million years old! Every natural fossil is unique and the fossils you receive will be similar to those pictured. 100% Authentic Fantasia Premium Fossils - A Brand Trusted Worldwide