Natural History - Iridescent Rainbow-Shell Ammonite

Cretaceous Period, Albian Stage, 113-100 million years BP. A natural iridescent rainbow-shell Cleoniceras besairiei ammonite from Madagascar. 190 grams, 91mm (3 3/4"). From an old Bristol paleontologi

Cretaceous Period, circa 113-100 million years B.P.. Cleoniceras besairiei with large portions of the shell with rainbow iridescence. 242 grams, 10 cm (4 in.). From a Lincolnshire, UK, collection. [No

Cretaceous Period, 145-65 million years B.P. A group of five natural iridescent rainbow shell Cleoniceras besairiei ammonites; held in a white card collector's tray. 30-39 grams, 45-52 mm width (182 g

Jurassic Period, 199-145 million years BP. A natural iridescent shell Parkinsonia sp. ammonite, in white card tray with label reading: 'Ammonite, Parkinsonia sp., Mid Jurassic Age (approx. 170 million

Cretaceous Period, Albian Stage, 113-100 million years BP. A group of four naturally iridescent rainbow-shell Cleoniceras besairiei ammonites from Madagascar with clean centres. 144 grams total, 25-64

Cretaceous Period, Albian Stage, 113-100 million years BP. A group of three A-grade naturally iridescent rainbow-shell Cleoniceras besairiei ammonites from Madagascar. 157 grams total, 52-61mm (2 - 2

Natural history, the serving dish formed of a single iridescent half-shell; together with four mother-of-pearl spoons, one with a silver handle set with two tiny Baroque pearls, and a mother-of-pearl

Rainbow fossil ammonite specimen iridescent colors and nice finish on this natural fossil specimen. About 2- 3 inches and a condition is nice generally.

Jurassic to Carboniferous Period, 199-3 million years B.P.. Mostly consisting of various species of ammonite, together with a number of shells. 362 grams total, 10-87 mm (3/8 - 3 3/8 in.). Acquired on

Ammonoidea coiled shell cephalopod, probably Devonian to late Cretaceous period. [9 1/4 x 12 1/2 x 3 3/4 inches].

Cretaceous Period, Albian Stage, 113-100 million years BP. A group of two A-grade, cut and polished Cleoniceras sp. ammonites from Madagascar, polished through much of the shell to reveal the calcite

Jurassic Period, 199-145 million years B.P. Perisphinctes sp. with much of the original shell material remaining, in old white card tray with old label reading: 'AMMONITE Perisphinctes sp., Mid Jurass

Opalized ammonite specimen-iridescent material in shell - possibly from Canada possible 400 million years old

Upper Jurassic Period, 170 million years BP. A Harpoceras elegans ammonite from Somerset, UK; mounted on a custom-made stand. 540 grams, 16.5cm including stand (6 1/2"). Property of a Lincolnshire, UK

Jurassic Period, 201-145 million years BP. A group of cut and polished ammonite halves revealing the inner chambers, two in old white card trays with A.B. Cotterill Collection, Wollaton, Nottingham, U

Jurassic Period, circa 200 million years B.P. Promicroceras planicosta with iron stained surface giving a beautiful contrast in colour, from the Lower Lias, Obtusum Zone. 42.53 grams, 67 mm (2 3/5 in.

Late Cretaceous Period, Cenomanian Stage, 100-94 millions years BP. An Acanthoceras sp. ammonite from Agadir, Morocco. 1.6 kg, 16.5cm (6 1/4"). Property of a Lincolnshire, UK, gentleman; acquired on t

Jurassic Period, 199-145 million years B.P. Comprising a composite of various sized ammonites with polished upper surface. 778 grams, 23 cm wide (9 in.). From Madagascar. From a Lincolnshire, UK, coll

Edmund Crouch (1789-1855). Shell Natural History Prints, Lamarck's Conchology. London, 1826. Illustrations of shells, from John Mawe's 'The Linnean system of conchology, with 36 plates drawn on stone

Edmund Crouch (1789-1855). Shell Natural History Prints, Lamarck's Conchology. London, 1826. Illustrations of shells, from John Mawe's 'The Linnean system of conchology, with 36 plates drawn on stone

Edmund Crouch (1789-1855). Shell Natural History Prints, Lamarck's Conchology. London, 1826. Illustrations of shells, from John Mawe's 'The Linnean system of conchology, with 36 plates drawn on stone

Edmund Crouch (1789-1855). Shell Natural History Prints, Lamarck's Conchology. London, 1826. Illustrations of shells, from John Mawe's 'The Linnean system of conchology, with 36 plates drawn on stone

Two natural history items, including: Placenticeras ammonite fossil, unearthed near Wasta, South Dakota; together with black tourmaline and quartz specimen; L: 11 1/4" (larger, approx.)

Early Jurassic Period, Lower Lias stage, 200-195 million years BP. A group of ten small pyrite ammonites, mainly Crucilobiceros densinodulum and Promicroceras sp from Pentacrinites Band, Stonebarrow,