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

Description

Genuine Promicroceras Golden Pyrite Ammonite Fossil – Jurassic Coast Treasure

Offered here is a stunning Promicroceras Golden Pyrite Ammonite Fossil, an authentic marine fossil from the famous Black Ven Marls of Stonebarrow Cliff, Charmouth, located on the world-renowned Jurassic Coast near Lyme Regis, Dorset, UK.

This beautiful ammonite is preserved with striking golden pyrite mineralisation, giving the shell an eye-catching metallic lustre while highlighting fine natural detail. Pyritised ammonites from Charmouth are among the most sought-after fossils in the UK, prized for their rarity, colour, and exceptional preservation.

The fossil shown in the photographs is the exact specimen you will receive. Full sizing details are provided in the images, and this piece has been carefully selected for its quality, visual appeal, and strong display character.

Your specimen was discovered by our own experienced team members, Alister and Alison, on 25 January 2026, and has been professionally cleaned, prepped, and treated by Alison to ensure long-term stability and presentation.

This fossil is a genuine specimen and includes a Certificate of Authenticity with lifetime guarantee, supplied as a generic authenticity card for complete confidence.

Geological Origin – 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 in the Early Jurassic Period.

At that time, Dorset lay beneath a warm shallow sea rich in marine life. Thick muds and marls accumulated on the sea floor, rapidly burying shells and preserving them in extraordinary detail.

Stonebarrow Cliff and the surrounding Charmouth coastline are internationally famous fossil sites, producing ammonites, belemnites, crustaceans, fish remains, and even iconic marine reptiles such as ichthyosaurs. The unique chemical conditions of these sediments allowed occasional pyrite replacement, creating spectacular golden ammonites like this Promicroceras.

Fossil Species – Promicroceras Ammonite

Promicroceras is a classic Early Jurassic ammonite genus within the subclass Ammonoidea, class Cephalopoda. These extinct marine molluscs were close relatives of modern squid and nautilus, thriving as active swimmers and predators in Jurassic oceans.

Promicroceras is especially valued by collectors for its:

• Compact, tightly coiled shell shape
• Fine ribbing and ornamentation
• Elegant whorl proportions
• Strong association with the earliest Jurassic ammonite faunas

Ammonites such as Promicroceras are important index fossils, helping geologists date marine sediments with high precision.

Golden Pyrite Preservation – Natural Metallic Detail

The most remarkable feature of this specimen is its golden pyrite mineral coating, formed during fossilisation when iron sulphide minerals replaced or covered the original shell material.

Pyritised ammonites are highly prized because:

• They display stunning metallic colour naturally
• Fine surface features are enhanced dramatically
• Each specimen is unique in tone and texture
• They combine palaeontology with mineral beauty

This fossil represents an excellent example of Charmouth pyrite preservation, making it both scientifically fascinating and visually striking.

Authentic Discovery and Professional Preparation

This fossil has been responsibly collected and expertly prepared:

• Discovered by Alister and Alison on 25 January 2026
• Cleaned, prepped, and treated by Alison
• Exact specimen shown in listing photos
• Certificate of Authenticity with lifetime guarantee included

Perfect For Collectors, Gifts and Jurassic Displays

Ideal for:

• Ammonite and pyrite fossil collectors
• Jurassic Coast enthusiasts
• Museum-style display collections
• Educational geology and palaeontology study
• Unique prehistoric gifts

A rare opportunity to own an authentic Promicroceras Golden Pyrite Ammonite Fossil from the legendary Jurassic Coast of Dorset, preserved from an ancient sea nearly 200 million years ago and supplied with lifetime Certificate of Authenticity.