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

Description

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

Offered here is an outstanding Microderoceras Golden Pyrite Ammonite Fossil, collected from the famous Black Ven Marls at Stonebarrow Cliff, Charmouth, on the world-renowned Jurassic Coast near Lyme Regis, Dorset, UK.

This specimen is a classic Lower Jurassic ammonite, beautifully preserved with rich golden pyrite mineralisation, giving it an eye-catching natural metallic lustre. Pyritised ammonites from Charmouth are increasingly scarce and highly prized for their scientific significance, aesthetic quality, and excellent preservation of shell detail.

The photographs show the exact fossil you will receive, with full sizing clearly displayed. This is a carefully chosen specimen, selected for strong rib definition, bright pyrite finish, and attractive overall form.

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 it is stable, display-ready, and protected for long-term preservation.

Every fossil we offer is 100% 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 back approximately 190–200 million years to the Early Jurassic Period.

During this time, the Dorset region was submerged beneath a warm shallow sea teeming with marine life. Ammonites flourished in abundance alongside belemnites, fish, crustaceans, and marine reptiles such as ichthyosaurs and plesiosaurs.

Fine marls and mudstones accumulated on the seabed, creating oxygen-poor conditions that helped preserve shells rapidly after burial. The Charmouth coastline, especially Stonebarrow Cliff, is internationally famous for producing exceptionally preserved ammonites, including rare golden pyritised examples like this Microderoceras.

Fossil Species – Microderoceras Ammonite

Microderoceras is a distinctive Early Jurassic ammonite genus within the subclass Ammonoidea, class Cephalopoda. These extinct marine molluscs were close relatives of modern squid and cuttlefish, living as fast-moving predators in Jurassic seas.

Microderoceras is particularly admired for:

• Its tightly coiled, compact shell shape
• Strong ribbing and sculptured whorl pattern
• Elegant proportions and excellent preservation potential
• Importance within Lower Lias ammonite faunas

Collectors value Microderoceras because it represents a classic Lyme Regis ammonite form, combining scientific relevance with outstanding display appeal, especially when preserved in pyrite.

Golden Pyrite Mineralisation – Natural Metallic Fossil Beauty

One of the most remarkable features of this specimen is its natural golden pyrite preservation. Pyritisation occurs when iron sulphide minerals form during fossilisation, coating or replacing shell material and creating a shimmering metallic finish.

Golden pyrite ammonites from Lyme Regis are highly sought after because:

• They are visually stunning and increasingly rare
• Pyrite highlights delicate ribbing and fine shell structure
• Each specimen is completely unique in colour and texture
• They make exceptional museum-quality display fossils

This fossil beautifully combines palaeontology with mineral artistry, making it a standout collector’s piece.

Authenticity, Discovery and Professional Preparation

This is a 100% genuine Microderoceras Golden Pyrite Ammonite Fossil, 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 display collections
• Educational geology and palaeontology study
• Unique prehistoric gifts

A rare opportunity to own an authentic Microderoceras 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.