Bifacially Polished Fossil Ammonite

Cretaceous Period, c.144 million years B.P.. A bifacially polished fossil ammonite. 335 grams, 11.8 cm (4 5/8 in.) From Madagascar. Stone Treasures, Midlands, UK, 2016. Ian Wilkinson collection, Notti

Cretaceous Period, 145-65 million years B.P. A cut and polished Phylloceras velledae ammonite in two halves, displaying the distinctive pattern of the cross-section chambers; held in a white card coll

Cretaceous Period, Albian Stage, 113-100 million years B.P. A cut and polished composite ammonite platter, revealing the internal structures of the shells. 661 grams, 23 cm wide (9 in.). From a Lincol

Jurassic Period, circa 199-145 million years B.P. A composite plate containing a large number of variously sized ammonites, polished upper face. 835 grams, 24.7 cm (9 3/4 in.). From Madagascar. From a

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 widt

Albian Cretaceous Period, 113-100 million years BP. A large A-grade cut and polished pair of Cleoniceras sp. ammonite displaying the distinctive pattern of the chambers; with card tray. 520 grams tota

Cretaceous Period, circa 150 million years B.P.. Cleoniceras sp. displaying the distinctive pattern of the cross-section chambers. 269 grams total, 10.5-10.7 cm (4 1/8 - 4 1/4 in.). From Madagascar.Co

Polished Fossil Ammonite Cretaceous Madagascar 4"

Cretaceous Period, 145-65 million years BP. A cut and polished Cleoniceras sp. ammonite pair with the distinctive pattern of the cross-section chambers, with surface lustre. 306 grams total, 11-11.9cm

Albian Cretaceous Period, 113-100 million years BP. A large A-grade cut and polished pair of Cleoniceras sp. ammonite displaying the distinctive pattern of the chambers; with card tray. 429 grams tota

Jurassic Period, 172-168 million years B.P. A cut and polished ammonite in two halves, distinctive cross section chambers filled with crystals, some iridescence to outer surfaces. 275 grams total, 10.

Albian Cretaceous Period, 113-100 million years BP. A large A-grade cut and polished pair of Cleoniceras sp. ammonite displaying the distinctive pattern of the chambers; with card tray. 503 grams, 13c

Middle Cretaceous Period, circa 150 million years B.P. Cleoniceras sp. displaying the distinctive pattern of the cross-section chambers, some iridescence to outer surfaces. 220 grams, 95 mm each (3 3/

Jurassic Period, 199-145 million years B.P. A pair of cut and polished fossil ammonite halves, each displaying the gas chambers; possibly Cleoniceras sp. 172 grams total, 95-97 mm (3 3/4 - 3 7/8 in.).

Cretaceous Period, 145-65 million years BP. A group of three polished Cleoniceras sp. fossil ammonites with opal lustre to the centres. 240 grams total, 64-70mm (2 1/2 - 2 3/4"). From a Cambridgeshire

Cretaceous Period, Albian Stage, 113-100 million years BP. A cut and polished Cleoniceras sp. ammonite in two halves, displaying the distinctive pattern of the cross-section chambers. 274 grams total,

Middle Cretaceous Period, 150 million years B.P.. Polished to reveal the distinctive structure of the Cleoniceras sp. chambers, some iridescence. 124 grams total, 77-81 mm (3 - 3 1/8 in.). From Madaga

Cretaceous Period, 145-65 million years B.P. A matching pair of cut and polished fossil Cleoniceras sp. ammonite halves, displaying the distinctive pattern of the chambers. 765 grams total, 15.1 cm ea

Cretaceous Period, 145-65 million years B.P. A Cleoniceras sp. ammonite polished through parts of the shell to reveal some of the calcite preserved inside, showing the dividing gas chambers known as s

Cretaceous Period, Albian Stage, 113-100 million years BP. A group of eight small A-grade cut and polished Cleoniceras sp. ammonites from Madagascar, with the distinctive pattern of the cross-section

Cretaceous Period, 145-65 million years B.P. A cut and polished Cleoniceras sp. ammonite displaying the distinctive pattern of the cross-section chambers. 138 grams total, 67-71 mm (2 1/2 - 2 3/4 in.)

200-144 million year BP. A cut and polished ammonite pair showing internal chambers and crystal structure, in white card tray with label reading: 'Ammonite, 144-200 Million Years, Madagascar'. 26 gram

Jurassic Period, 200-145 million years BP. A cut and polished matrix containing a fossil ammonite showing the internal chambers and crystal formation. 562 grams, 13.5cm (5 1/4"). From a Lincolnshire,

Jurassic Period, 200-145 million years BP. An A-grade cut and polished ammonite from Madagascar, showing internal chambers and crystal formation, opalescent lustre to the shell. 18 grams total, 35mm (