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

Description

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

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

This specimen is a classic Early Jurassic ammonite, preserved with striking golden pyrite mineralisation, giving it a natural metallic sheen and exceptional visual appeal. Pyritised ammonites from Charmouth are highly prized for their rarity, scientific interest, and stunning presentation.

The photographs show the exact fossil you will receive, with full sizing clearly visible in the provided images. This is a carefully chosen specimen, selected for its strong shell detail, bright pyrite finish, and excellent overall preservation.

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 collection or display.

Every fossil we offer is 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 to approximately 190–200 million years ago during the Early Jurassic.

At this time, Dorset was submerged beneath a warm shallow sea filled with marine life. Ammonites flourished alongside belemnites, fish, crustaceans, and marine reptiles such as ichthyosaurs. Fine muds and marls accumulated in quiet offshore waters, rapidly burying shells and allowing excellent fossil preservation.

Stonebarrow Cliff and Charmouth remain among the most significant ammonite localities in Europe, producing world-famous specimens, including rare pyritised forms like this Promicroceras.

Fossil Species – Promicroceras Ammonite

Promicroceras is a small but highly collectible ammonite genus from the Early Jurassic, belonging to the subclass Ammonoidea, class Cephalopoda. These extinct marine molluscs were close relatives of modern squid and cuttlefish, living as active predators in Jurassic seas.

Promicroceras is especially recognised for:

• Tight spiral coiling
• Fine, well-defined ribbing
• Distinctive compact morphology
• Strong preservation potential in Lower Lias deposits

This genus is particularly popular with collectors due to its elegant form and association with classic Lyme Regis fossil horizons.

Golden Pyrite Mineralisation – Natural Metallic Beauty

A key feature of this fossil is its natural golden pyrite preservation. Pyritisation occurs when iron sulphide minerals form during fossilisation, replacing or coating the shell and producing a brilliant metallic finish.

Golden pyrite ammonites from Lyme Regis are highly valued because:

• They are visually striking and increasingly rare
• Pyrite highlights delicate ribbing and shell detail
• Each specimen is completely unique
• They make exceptional display pieces

This fossil is both scientifically significant and naturally beautiful, combining palaeontology with mineral artistry.

Authenticity, Discovery and Professional Preparation

This is a 100% genuine Promicroceras Golden Pyrite Ammonite, 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 natural history displays
• Educational geology and palaeontology collections
• Unique prehistoric gifts

A rare opportunity to own an authentic Promicroceras 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.