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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3.5" Iridescent Coloceras johnstoni Ammonite Fossil, Hettangian, Jurassic: Watchet, UK
3.5" Iridescent Coloceras johnstoni Ammonite Fossil, Hettangian, Jurassic: Watchet, UK - Image 2

3.5″ Iridescent Coloceras johnstoni Ammonite Fossil, Hettangian, Jurassic: Watchet, UK

CHF F78.22

This listing features a stunning 3.5-inch ammonite fossil, Coloceras johnstoni, from the Hettangian stage of the Jurassic period, discovered in Watchet, United Kingdom. This ammonite displays a spectacular natural iridescence, revealing flashes of color across its surface, making it a prized collector’s specimen.

About Coloceras johnstoni

Coloceras johnstoni is a rare ammonite species from the very beginning of the Jurassic period, approximately 200 million years ago. These ammonites thrived in the ancient seas that covered what is now Britain, and their shells have been preserved in a way that enhances their natural beauty. The fine details of the shell structure, along with the remarkable iridescence, make this an exceptional piece for collectors.

Fossil Details:

  • Scientific Name: Coloceras johnstoni
  • Common Name: Iridescent Ammonite
  • Geological Age: Hettangian, Jurassic (approx. 200 million years old)
  • Location: Watchet, United Kingdom
  • Size: 3.5 inches (see photos for exact measurements)
  • Preservation: Displays natural iridescence with well-preserved shell details

Why This Fossil is Special:

  • Highly sought-after ammonite species from the early Jurassic period
  • Natural iridescence creates a stunning visual effect
  • Rare UK locality specimen from Watchet, a famous fossil site
  • Perfect for collectors, home decor, or educational purposes
  • Comes from the Alice Purnell Collection, one of the largest ammonite collections in the world
  • 100% Genuine Specimen with a Certificate of Authenticity

What You See is What You Get

The actual fossil shown in the photos is the exact specimen you will receive—no stock images used.

Buy with Confidence:

  • Authenticity Guaranteed – Professionally sourced, identified, and verified
  • Secure Packaging – Carefully packed to ensure safe delivery
  • Fast & Reliable Shipping – Worldwide shipping available

This iridescent ammonite fossil is a true collector’s piece, offering a glimpse into the ancient Jurassic seas of Britain. A must-have for fossil enthusiasts and natural history lovers alike!

(Actual as seen)

Out of stock

SKU: AF0309 Category:

Description

This listing features a stunning 3.5-inch ammonite fossil, Coloceras johnstoni, from the Hettangian stage of the Jurassic period, discovered in Watchet, United Kingdom. This ammonite displays a spectacular natural iridescence, revealing flashes of color across its surface, making it a prized collector’s specimen.

About Coloceras johnstoni

Coloceras johnstoni is a rare ammonite species from the very beginning of the Jurassic period, approximately 200 million years ago. These ammonites thrived in the ancient seas that covered what is now Britain, and their shells have been preserved in a way that enhances their natural beauty. The fine details of the shell structure, along with the remarkable iridescence, make this an exceptional piece for collectors.

Fossil Details:

  • Scientific Name: Coloceras johnstoni
  • Common Name: Iridescent Ammonite
  • Geological Age: Hettangian, Jurassic (approx. 200 million years old)
  • Location: Watchet, United Kingdom
  • Size: 3.5 inches (see photos for exact measurements)
  • Preservation: Displays natural iridescence with well-preserved shell details

Why This Fossil is Special:

  • Highly sought-after ammonite species from the early Jurassic period
  • Natural iridescence creates a stunning visual effect
  • Rare UK locality specimen from Watchet, a famous fossil site
  • Perfect for collectors, home decor, or educational purposes
  • Comes from the Alice Purnell Collection, one of the largest ammonite collections in the world
  • 100% Genuine Specimen with a Certificate of Authenticity

What You See is What You Get

The actual fossil shown in the photos is the exact specimen you will receive—no stock images used.

Buy with Confidence:

  • Authenticity Guaranteed – Professionally sourced, identified, and verified
  • Secure Packaging – Carefully packed to ensure safe delivery
  • Fast & Reliable Shipping – Worldwide shipping available

This iridescent ammonite fossil is a true collector’s piece, offering a glimpse into the ancient Jurassic seas of Britain. A must-have for fossil enthusiasts and natural history lovers alike!

Additional information

Weight 0.1 g
Dimensions 10 × 10 × 10 cm
Era

Jurassic
Origin

United Kingdom

Jurassic Information

The Jurassic Period (201–145 million years ago) was the golden age of dinosaurs, with iconic species like Brachiosaurus, Stegosaurus, and Allosaurus dominating the land. It was a time of warm, humid climates, with high sea levels that created vast shallow seas, supporting abundant marine reptiles, ammonites, and early coral reefs. The first birds, such as Archaeopteryx, evolved from small theropod dinosaurs, while early mammals remained small and nocturnal. Lush forests of cycads, conifers, and ferns covered the land, providing food for giant herbivores. The breakup of the supercontinent Pangaea accelerated, shaping Earth's geography and setting the stage for the diverse ecosystems of the Cretaceous.

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