Dowilliceras Ammonite – Cretaceous – Madagascar (with Pyrite Zone) This impressive ammonite, attributed to the genus Dowilliceras, originates from the Cretaceous deposits of Madagascar. The specimen preserves the classic coiled form and pronounced ribbing typical of this group, with well-defined ridges radiating outward from the center and giving the fossil a strong sculptural presence. The surface displays a natural palette of soft greys, creamy tones, and subtle greenish hues created through long-term mineralization. In one area, the fossil features visible pyrite mineralization, adding a striking metallic contrast and enhancing both its visual appeal and geological interest. The internal whorls and chamber structure are clearly expressed, making this specimen not only an attractive display piece but also a valuable example of ancient marine life. Ammonites such as this were cephalopods related to modern squids and octopuses, and their fossils are widely used in geology as important index fossils for dating rock layers. The metal display stand shown in the photos is included, allowing the specimen to be presented securely and elegantly. A visually captivating and scientifically meaningful ammonite, ideal for collectors, educational collections, or refined natural history displays.