Crucilobiceras Golden Pyrite Ammonite Fossil Jurassic Lyme Regis Dorset Black Ven Marls Stonebarrow Cliff Specimen COA Included

Description

Genuine Crucilobiceras Golden Pyrite Ammonite – Jurassic Coast Fossil from Lyme Regis

Offered here is a stunning Crucilobiceras Golden Pyrite Ammonite Fossil, collected from the famous Black Ven Marls at Stonebarrow Cliff, Charmouth, on England’s world-renowned Jurassic Coast near Lyme Regis, Dorset, UK.

This specimen is an exceptional Early Jurassic ammonite, preserved with beautiful natural golden pyrite mineralisation, giving it a striking metallic finish and superb aesthetic appeal. Pyritised ammonites from Charmouth are among the most sought-after fossils in the UK, combining scientific importance with remarkable natural beauty.

The photographs show the exact fossil you will receive, with full sizing clearly visible in the provided images. This is a carefully chosen piece, selected for its quality of preservation, strong shell detail, and impressive pyrite enhancement.

Your fossil was discovered by our own team members, Alister and Alison, on 25 January 2026, and has been professionally cleaned, prepped, and treated by Alison, ensuring long-term stability and excellent presentation for display or collection.

Every fossil we offer is genuine, and this specimen includes a Certificate of Authenticity with lifetime guarantee, supplied as a generic authenticity card for complete buyer confidence.

Geological Setting – Black Ven Marls, Lower Lias, Early Jurassic

This ammonite originates from the renowned Black Ven Marls, part of the Lower Lias Group, dating to approximately 190–200 million years ago during the Early Jurassic.

At the time of deposition, Dorset lay beneath a warm shallow sea teeming with marine life including ammonites, belemnites, fish, crustaceans, and marine reptiles such as ichthyosaurs. Fine marls and mudstones accumulated in calm offshore waters, rapidly burying shells and allowing exceptional fossil preservation.

Stonebarrow Cliff and Charmouth remain internationally important fossil sites, producing some of the most iconic ammonites in Europe, including rare pyritised forms such as this Crucilobiceras.

Fossil Species – Crucilobiceras Ammonite

Crucilobiceras is a distinctive Early Jurassic ammonite genus within the subclass Ammonoidea, class Cephalopoda. Ammonites were highly successful marine predators related to modern squid and cuttlefish, living throughout the Jurassic seas in extraordinary diversity.

Crucilobiceras is recognised for its characteristic morphology:

• Strong ribbed ornamentation
• Well-defined whorl shape
• Classic spiral coiling with robust shell structure
• Distinctive Early Jurassic appearance

This genus is an important part of Lower Jurassic ammonite assemblages and is highly valued by collectors for its bold form and association with the famous Charmouth fossil beds.

Golden Pyrite Mineralisation – A Natural Metallic Finish

One of the most striking features of this fossil is its natural golden pyrite preservation. Pyritisation occurs when iron sulphide minerals form within and around the shell during fossilisation, creating a brilliant metallic sheen.

Golden pyrite ammonites from Lyme Regis are prized because:

• They are visually spectacular and increasingly rare
• Pyrite highlights fine shell ribbing and detail
• Each specimen is completely unique in pattern and finish
• They make exceptional display centrepieces

This fossil is both a scientifically significant ammonite and a naturally beautiful collectible mineralised specimen.

Authenticity, Discovery and Professional Preparation

This is a 100% genuine Crucilobiceras Golden Pyrite Ammonite, responsibly collected and expertly prepared.

• Discovered by Alister and Alison (25 January 2026)
• Cleaned, prepped, and treated by Alison
• Lifetime Certificate of Authenticity included
• Exact specimen shown in photos

Ideal For Collectors, Gifts and Jurassic Displays

Perfect for:

• Ammonite and pyrite fossil collectors
• Jurassic Coast and Lyme Regis enthusiasts
• Museum-quality natural history displays
• Educational geology and palaeontology collections
• Unique prehistoric gifts

A rare opportunity to own an authentic Crucilobiceras Golden Pyrite Ammonite Fossil from Stonebarrow Cliff, Charmouth, preserved from an ancient Jurassic sea nearly 200 million years ago and accompanied by a lifetime Certificate of Authenticity.