Large Cut & Polished Ammonite Pair | 21cm | Lower Cretaceous | Madagascar dead Students can observe the dramatic

Students can observe the dramatic difference between upperwings (iridescent blue for mate attraction) and underwings (camouflaged brown for predator protection when wings are closed)

sexual dimorphism (females are larger than males)

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or creative projects

Large Cut & Polished Ammonite Pair | 21cm | Lower Cretaceous | Madagascar dead Students can observe the dramatic115 Million Years of Natural Architecture Ammonites were cephalopod molluscs relatives of today's nautilus and squid that dominated the world's oceans for over 300 million years before their extinction at the end of the Cretaceous period. Named after the ram horned Egyptian god Ammon, whose coiled horns their shells resemble, ammonites ranged in size from a few millimetres to over two metres in diameter. This pair, sourced from Madagascar and dating