Fossils for Sale - High-quality BRITISH and WORLDWIDE Fossils. An impressive selection of fossils, including Ammonites, Trilobites, Belemnites, Fossil Fish, Fossil Shark Teeth, Fossilised Insects in Amber, Dinosaurs, and Reptiles. UK Fossils was formed in 1988 and collects and preps our own fossils in the heart of the Jurassic Coast, collecting fossils from Lyme Regis, Charmouth and Somerset. Our passion for fossils is reflected in our carefully curated collection, which includes some of the rarest and most unique specimens available.

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Cretaceous ammonite fossil – polished half – madagascar – vibrant chambered shell – genuine specimen with certificate
Cretaceous ammonite fossil – polished half – madagascar – vibrant chambered shell – genuine specimen with certificate - Image 2

Cretaceous ammonite fossil – polished half – madagascar – vibrant chambered shell – genuine specimen with certificate

£19.20

Ammonites are one of the most recognisable fossils around, this is due to their familiar spiral shape shell reminiscent of what we know as a snail shell, though these creatures are not related to snails at all! They were marine animals, present between 240 – 65 million years ago, that had a coiled external shell similar to that of the modern-day nautilus, and although they resembled a nautilus, these molluscs are more closely related to living Coleoids, i.e. octopus, squid, and cuttlefish!

 

These beautiful Ammonites have been sliced in half and polished to expose the amazingly colourful inner chambers of the fossil.

 

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity

 

Specimen Ammonite

Age: Cretaceous

Location: Madagascar

Size (picture scale cube=1cm): 77 x 19 x 58mm (3.03 x 0.75 x 2.28 inches)

 

The fossil is a carefully chosen piece with a photo that shows the actual specimen you will receive.

(Actual as seen)

Only 1 left in stock

SKU: FP9887 Category:

Description

This listing features a genuine Cretaceous Ammonite fossil from Madagascar, presented as a single sliced and polished half, showcasing its beautifully preserved internal chambers. These internal structures have been naturally mineralised over millions of years, producing stunning colourful patterns that are revealed through the polishing process.

Ammonites are among the most recognisable and iconic fossils due to their distinctive spiral-shaped shells. Though their shells resemble those of modern snails, Ammonites were marine molluscs more closely related to present-day squid, cuttlefish, and octopus. They thrived in the world’s oceans from around 240 to 65 million years ago, and this particular specimen is from the Cretaceous Period, approximately 145 to 66 million years ago.

These fascinating creatures moved through the water by jet propulsion, expelling water from their body cavity to push themselves forward. Ammonites came in various shapes and sizes, from a few millimetres to giants reaching up to 8 feet in diameter.

Each fossil tells a story of ancient marine ecosystems and provides a direct connection to the deep geological past. This specimen has been professionally sliced and polished to both preserve and highlight its natural beauty. Whether you’re a collector, educator, or simply love Earth’s natural history, this ammonite makes for a unique display or thoughtful gift.

Item Details:

  • Specimen: Ammonite (Single Half)
  • Age: Cretaceous Period (approx. 145–66 million years ago)
  • Location: Tulear, Madagascar
  • Scale Reference: Scale cube = 1cm. Please see photo for full sizing.
  • Certificate of Authenticity: Included

ACTUAL AS SEEN: You will receive the exact specimen shown in the photos. Each item is carefully hand-selected and photographed to ensure transparency and quality.

Please Note:

  • Some fossils may be propped for photography.
  • Colours may vary slightly depending on lighting and monitor settings.
  • All measurements are as accurate as possible, though minor variation may occur due to the natural irregularities of the fossil.
  • Once sold, a new photo and listing will be created for the next specimen.

100% Genuine Fossil – Unique Natural History Specimen – Includes Certificate of Authenticity

Additional information

Era

Cretaceous
Origin

Madagascar

Cretaceous Information

The Cretaceous Period (145–66 million years ago) was the final era of the Mesozoic, marked by the dominance of dinosaurs and the rise of flowering plants. It had a warm, greenhouse climate, with high sea levels that created vast shallow inland seas. Marine life flourished, including mosasaurs, ammonites, and rudist reefs, while the land was ruled by iconic dinosaurs like Tyrannosaurus rex, Triceratops, and Spinosaurus. Mammals and birds diversified, and insects thrived. The period ended with the mass extinction event, likely caused by an asteroid impact, wiping out the dinosaurs and paving the way for the rise of mammals in the Cenozoic.

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