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

Description

Genuine Promicroceras Golden Pyrite Ammonite Cluster – Jurassic Coast Fossil from Lyme Regis

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

This exceptional specimen preserves multiple Promicroceras ammonites together in a natural cluster formation, creating a striking and highly collectible fossil display piece. The ammonites are beautifully enhanced by golden pyrite mineralisation, giving them a rich metallic lustre and highlighting intricate shell detail.

Pyritised ammonite clusters from Charmouth are increasingly rare and especially sought after, combining scientific value with outstanding 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 pyrite finish, and impressive cluster composition.

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, well-presented, and ready for long-term display or collection.

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

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

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

At this time, Dorset lay beneath a warm shallow tropical sea, rich in marine biodiversity. Ammonites thrived in abundance alongside belemnites, fish, crustaceans, and marine reptiles such as ichthyosaurs and plesiosaurs.

The fine muds and marls of the Lower Lias were deposited in calm offshore conditions, allowing delicate shells to be rapidly buried and preserved. Charmouth and Stonebarrow Cliff remain among Europe’s most important fossil localities, famous for producing beautifully preserved ammonites, including rare pyritised clusters such as this one.

Fossil Species – Promicroceras Ammonite Cluster

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 cuttlefish, living as active swimmers and predators in Jurassic seas.

Promicroceras is particularly recognised for:

• Compact, tightly coiled shell form
• Fine ribbing and elegant whorl structure
• Strong preservation potential in Lower Lias sediments
• High collectability among Lyme Regis ammonite fauna

Cluster specimens are especially desirable, as they represent multiple individuals preserved together, offering a rare glimpse into ammonite-rich seabed horizons.

Golden Pyrite Preservation – Natural Metallic Fossil Beauty

One of the most striking aspects of this fossil is the natural golden pyrite mineralisation. Pyritisation occurs when iron sulphide minerals form during fossilisation, replacing or coating shell material to create a shimmering metallic finish.

Golden pyrite ammonite clusters from Lyme Regis are prized because:

• They are visually spectacular and increasingly scarce
• Pyrite highlights delicate ribbing and shell detail
• Each cluster is completely unique in pattern and composition
• They create exceptional museum-style display pieces

This fossil is both a scientifically meaningful ammonite cluster and a naturally beautiful mineralised specimen.

Authenticity, Discovery and Professional Preparation

This is a 100% genuine Promicroceras Golden Pyrite Ammonite Cluster, 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 Display Collections

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 Promicroceras Golden Pyrite Ammonite Fossil Cluster from Stonebarrow Cliff, Charmouth, preserved from a Jurassic sea nearly 200 million years ago and accompanied by a lifetime Certificate of Authenticity.