Cretaceous Period, 145-65 million years B.P. A cut and polished Phylloceras velledae ammonite in two halves with iridescent surfaces; held in a white card collector's tray. 231-254 grams, 10.7 cm width (508 grams total, 12.8 x 10 cm including tray) (4 1/3 in. (5 x 4 in.)). From Madagascar. Acquired 1930-1960. Collection of palaeontologist R Gledhill. [2, No Reserve]