22132 - Beautiful 4.03 inch Douvilleiceras mammilatum Lower Cretaceous Ammonite Madagascar - Agatized Douvilleiceras o Image capture Software: RS

o Image capture Software: RS ImageTM v

several of which are semi-precious gemstones

† Orthoceras

It has some small glued and tiny filled fractures

22132 - Beautiful 4.03 inch Douvilleiceras mammilatum Lower Cretaceous Ammonite Madagascar - Agatized Douvilleiceras o Image capture Software: RSThis is a huge 4. 03" wide Douvilleiceras ammonite from the Upper Cretaceous of Madagascar. This genus of ammonites has earned the local name "Tractor Ammonites", due to their distinctively bumpy surface and pronounced ridges making them resemble a tractor tire. This particular example has been nicely prepared to remove the hard rock and expose the shell.