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

Description

Genuine Promicroceras Golden Pyrite Ammonite – Jurassic Coast Treasure from Dorset

Offered here is a beautiful and highly collectible Promicroceras golden pyrite ammonite fossil, preserved from the famous Black Ven Marls of the Lower Lias Formation along the world-renowned Jurassic Coast of Dorset, England. This specimen comes from Stonebarrow Cliff, Charmouth, Lyme Regis, one of Europe’s most celebrated localities for exceptionally preserved Early Jurassic ammonites.

This is a carefully chosen piece, selected for its fine shell detail, striking golden pyrite mineralisation, and outstanding 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 includes a Certificate of Authenticity with lifetime guarantee, supplied as a generic authenticity card for permanent documentation and complete 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 marine 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 exceptional 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

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

Promicroceras is especially valued for its compact, tightly coiled shell and well-defined ribbing, making it a favourite among collectors of smaller, highly detailed ammonites. These fossils provide important biostratigraphic markers in the Lower Lias, helping geologists date and correlate Early Jurassic marine strata across Europe.

Its refined morphology and relative collectability make Promicroceras an excellent choice for both beginner and advanced ammonite collectors.

Golden Pyrite Preservation and Visual Appeal

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

The ammonite retains its spiral whorls and ribbing in beautiful detail, enhanced by the contrast of golden pyrite against the Jurassic matrix. Pyritised ammonites are highly prized because they combine deep-time fossil history with the natural beauty of mineral preservation.

Preparation, Provenance and Authenticity

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

A lifetime Certificate of Authenticity is included with every purchase, ensuring complete 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 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.