Bidspirit auction | Natural History - Iridescent Rainbow

Natural History - Iridescent Rainbow Shell Ammonite - Cretaceous Period, circa 113-100 million years B.P.. Cleoniceras besairiei with large portions of the shell with rainbow iridescence. 100 grams, 72 mm (2 7/8 in.). From Madagascar.Acquired 1950s-1960s.From an old Bristol, UK, palaeontological collection. [No Reserve]