Promicroceras Golden Pyrite Cluster Ammonite Fossil Jurassic Coast Dorset UK Lower Lias Black Ven Marls Charmouth COA Included

Description

Genuine Promicroceras Golden Pyrite Cluster – Rare Jurassic Ammonite Fossil from Dorset

Offered here is an exceptional Promicroceras golden pyrite ammonite cluster fossil, a highly attractive natural grouping of multiple ammonites preserved together in striking metallic pyrite. This specimen comes from the famous Black Ven Marls of the Lower Lias Formation, collected along the world-renowned Jurassic Coast of Dorset, England.

The locality is Stonebarrow Cliff, Charmouth, Lyme Regis, one of Europe’s most important fossil ammonite sites, celebrated for producing beautifully preserved Early Jurassic specimens. Cluster fossils like this are particularly desirable because they represent a rare snapshot of ancient seafloor life, where multiple ammonites were buried and fossilised together.

This is a carefully chosen piece, selected for its outstanding visual appeal, strong pyrite preservation, and excellent display quality. The photographs show the exact fossil you will receive, with full sizing details clearly visible in the provided images.

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

Importantly, this specimen was discovered by our own experienced team members, Alister and Alison, on 23 January 2026, and has been professionally cleaned, prepped, and treated by Alison, ensuring excellent presentation and long-term stability.

Geological Setting – Black Ven Marls, Lower Lias

This fossil originates from the famous Black Ven Marls, part of the Lower Lias Group, dating to the Early Jurassic approximately 190–200 million years ago. During this period, Dorset lay beneath a warm, shallow sea rich in ammonites, belemnites, fish, and marine reptiles.

The marls were deposited in a quiet offshore environment where fine sediments settled onto the seabed. Low oxygen conditions helped reduce decay and scavenging, allowing ammonite shells to fossilise in remarkable detail.

Stonebarrow Cliff and the Charmouth coastline are internationally famous for producing some of the finest Early Jurassic ammonites in the world, making specimens from this locality extremely desirable.

Fossil Species – Promicroceras Ammonite Cluster

Promicroceras is a distinctive genus of Early Jurassic ammonite belonging to the extinct subclass Ammonoidea, within the class Cephalopoda. These marine molluscs were close relatives of modern squid and cuttlefish and were among the dominant predators of Jurassic seas.

Promicroceras is especially valued for its compact, tightly coiled shell and beautifully defined ribbing. Cluster specimens are rarer than single ammonites, as they preserve multiple individuals together, offering a unique and more dramatic fossil display.

Promicroceras ammonites are also important index fossils in the Lower Lias, helping geologists date and correlate Early Jurassic strata across Europe.

Golden Pyrite Mineralisation and Display Features

This specimen displays brilliant golden pyrite preservation, often called “fool’s gold.” Pyrite forms during fossilisation when the original shell is replaced or infilled, creating a metallic golden lustre that makes these fossils exceptionally eye-catching.

The cluster retains clear spiral whorls and ribbing, enhanced by the contrast of pyrite against the Jurassic matrix. The presence of multiple ammonites in one block makes this a standout collector’s piece, combining fossil rarity with mineral beauty.

Preparation, Provenance and Authenticity

This is a 100% genuine Promicroceras golden pyrite ammonite cluster, responsibly collected from Stonebarrow Cliff by Alister and Alison, and expertly prepared and stabilised by Alison for long-term preservation.

A lifetime Certificate of Authenticity is included with every purchase, ensuring full confidence in provenance and genuineness.

Ideal For Collectors, Gifts and Educational Displays

This fossil is perfect for:

• Ammonite and Jurassic fossil collectors
• Pyrite mineral and fossil enthusiasts
• Lyme Regis and Charmouth Jurassic Coast fans
• Natural history and geology displays
• Unique prehistoric gifts with real discovery provenance

A rare opportunity to own an authentic golden pyrite Promicroceras ammonite cluster from the legendary Black Ven Marls of Charmouth, discovered and prepared by our own expert team and preserved from an ancient sea nearly 200 million years old.