Species: Argonauticeras besairiei Age: Cretaceous, Albian Locality: Mahajanga Basin, Madagascar Measurements: 21 cm diameter – 9 cm breadth Weight: 3.7 kg Superb polished ammonite with beautiful suture lines and pinkish shell. The last preserved septum has been prepared to reveal its characteristic shape. An uncommon species that is rare in this size. Minor cracks were filled prior to polishing.