A stunning oval-shaped flat plate made out of polished ammonite and Orthoceras. This plate is perfect as a gift that would compliment any dining or living room. Orthoceras ("straight horn") is a genus of extinct nautiloid cephalopod. This genus is sometimes called Orthoceratites. These are slender, elongate shells with the middle of the body chamber transversely constricted, and a subcentral Orthochoanitic siphuncle. The surface is ornamented by a network of fine lirae. Stock photo is shown. You will receive a similar pattern, size, and quality specimen.