Oxynoticeras Golden Pyrite Ammonite Fossil Jurassic Dorset UK Black Ven Marls Lower Lias Stonebarrow Cliff Charmouth Lyme Regis
£ 18.00
GENUINE GOLDEN PYRITE OXYNOTICERAS AMMONITE FROM THE JURASSIC COASTPresented here is a striking Oxynoticeras golden pyrite ammonite fossil,
collected from the renowned Black Ven Marls at Stonebarrow Cliff, Charmouth, along the iconic Jurassic Coast at Lyme Regis, Dorset, UK. This is a carefully selected natural specimen, with the photographs showing the exact fossil you will receive. Full sizing and scale can be clearly seen in the images provided.The specimen was discovered by our own team members, Alister and Alison, on 22 January 2026, and has been professionally cleaned, prepared, and stabilised by Alison to ensure long-term preservation and strong visual appeal. A lifetime Certificate of Authenticity on a generic card is included, guaranteeing this fossil as a genuine specimen. SPECIES OVERVIEW – OXYNOTICERASOxynoticeras is a distinctive ammonite genus from the Lower Jurassic (Lower Lias), belonging to the Order Ammonitida and Family Oxynoticeratidae. These ammonites lived during the Sinemurian Stage, around 195 million years ago, when warm, shallow seas covered much of southern Britain.Oxynoticeras plays an important role in Early Jurassic ammonite zonation and is highly regarded by both collectors and researchers. Specimens from Dorset are especially prized due to their classic morphology and exceptional preservation within the Black Ven Marls. MORPHOLOGY AND DIAGNOSTIC CHARACTERISTICSThis specimen exhibits the classic features that define Oxynoticeras, including:
• A compressed, streamlined shell profile
• A sharp and prominent ventral keel
• Fine ribbing and growth lines across the shell flanks
• Symmetrical coiling with strong definitionThe distinctive keel and narrow whorl section suggest Oxynoticeras was an active swimmer, well adapted to life in open Jurassic seas. GOLDEN PYRITE PRESERVATIONOne of the most visually impressive aspects of this fossil is its natural golden pyrite mineralisation. Pyrite forms when iron and sulphur combine under low-oxygen conditions within marine sediments. Over millions of years, this process replaced or infilled the original shell material, producing a shimmering metallic gold appearance.Pyritised ammonites from the Black Ven Marls are particularly sought after, as they preserve fine morphological detail while offering exceptional display quality. Each specimen is unique, making this fossil both scientifically valuable and aesthetically striking. GEOLOGICAL CONTEXT – BLACK VEN MARLS, LOWER LIASThe Black Ven Marls were deposited in a quiet offshore marine environment during the Early Jurassic. Fine-grained muds settled on the sea floor, rapidly burying ammonites and other marine organisms, which helped protect them from decay and allowed for mineral replacement such as pyritisation.Stonebarrow Cliff and Charmouth lie within the UNESCO World Heritage-listed Jurassic Coast, one of the most important fossil regions on Earth. Fossils from this area have been studied for over two centuries and remain central to understanding Jurassic marine ecosystems. COLLECTOR AND DISPLAY APPEALThis Oxynoticeras ammonite is ideal for:
• Ammonite and fossil collectors
• Mineral collectors attracted to pyrite specimens
• Educational and teaching collections
• Display cabinets and curated fossil displaysThe combination of elegant shell form and golden pyrite preservation makes this a standout British ammonite fossil. PROVENANCE AND AUTHENTICITY
• Fossil: Oxynoticeras golden pyrite ammonite
• Formation: Black Ven Marls, Lower Lias
• Geological age: Lower Jurassic, Sinemurian
• Locality: Stonebarrow Cliff, Charmouth, Lyme Regis, Dorset, UK
• Discovered: 22 January 2026 by Alister and Alison
• Prepared by: Alison
• Certificate: Lifetime Certificate of Authenticity includedThis fossil represents a genuine piece of Dorset’s Jurassic seabed, preserving a marine animal that lived nearly 200 million years ago, and offers a rare opportunity to own a beautifully preserved golden pyrite ammonite from one of the world’s most celebrated fossil localities.
collected from the renowned Black Ven Marls at Stonebarrow Cliff, Charmouth, along the iconic Jurassic Coast at Lyme Regis, Dorset, UK. This is a carefully selected natural specimen, with the photographs showing the exact fossil you will receive. Full sizing and scale can be clearly seen in the images provided.The specimen was discovered by our own team members, Alister and Alison, on 22 January 2026, and has been professionally cleaned, prepared, and stabilised by Alison to ensure long-term preservation and strong visual appeal. A lifetime Certificate of Authenticity on a generic card is included, guaranteeing this fossil as a genuine specimen. SPECIES OVERVIEW – OXYNOTICERASOxynoticeras is a distinctive ammonite genus from the Lower Jurassic (Lower Lias), belonging to the Order Ammonitida and Family Oxynoticeratidae. These ammonites lived during the Sinemurian Stage, around 195 million years ago, when warm, shallow seas covered much of southern Britain.Oxynoticeras plays an important role in Early Jurassic ammonite zonation and is highly regarded by both collectors and researchers. Specimens from Dorset are especially prized due to their classic morphology and exceptional preservation within the Black Ven Marls. MORPHOLOGY AND DIAGNOSTIC CHARACTERISTICSThis specimen exhibits the classic features that define Oxynoticeras, including:
• A compressed, streamlined shell profile
• A sharp and prominent ventral keel
• Fine ribbing and growth lines across the shell flanks
• Symmetrical coiling with strong definitionThe distinctive keel and narrow whorl section suggest Oxynoticeras was an active swimmer, well adapted to life in open Jurassic seas. GOLDEN PYRITE PRESERVATIONOne of the most visually impressive aspects of this fossil is its natural golden pyrite mineralisation. Pyrite forms when iron and sulphur combine under low-oxygen conditions within marine sediments. Over millions of years, this process replaced or infilled the original shell material, producing a shimmering metallic gold appearance.Pyritised ammonites from the Black Ven Marls are particularly sought after, as they preserve fine morphological detail while offering exceptional display quality. Each specimen is unique, making this fossil both scientifically valuable and aesthetically striking. GEOLOGICAL CONTEXT – BLACK VEN MARLS, LOWER LIASThe Black Ven Marls were deposited in a quiet offshore marine environment during the Early Jurassic. Fine-grained muds settled on the sea floor, rapidly burying ammonites and other marine organisms, which helped protect them from decay and allowed for mineral replacement such as pyritisation.Stonebarrow Cliff and Charmouth lie within the UNESCO World Heritage-listed Jurassic Coast, one of the most important fossil regions on Earth. Fossils from this area have been studied for over two centuries and remain central to understanding Jurassic marine ecosystems. COLLECTOR AND DISPLAY APPEALThis Oxynoticeras ammonite is ideal for:
• Ammonite and fossil collectors
• Mineral collectors attracted to pyrite specimens
• Educational and teaching collections
• Display cabinets and curated fossil displaysThe combination of elegant shell form and golden pyrite preservation makes this a standout British ammonite fossil. PROVENANCE AND AUTHENTICITY
• Fossil: Oxynoticeras golden pyrite ammonite
• Formation: Black Ven Marls, Lower Lias
• Geological age: Lower Jurassic, Sinemurian
• Locality: Stonebarrow Cliff, Charmouth, Lyme Regis, Dorset, UK
• Discovered: 22 January 2026 by Alister and Alison
• Prepared by: Alison
• Certificate: Lifetime Certificate of Authenticity includedThis fossil represents a genuine piece of Dorset’s Jurassic seabed, preserving a marine animal that lived nearly 200 million years ago, and offers a rare opportunity to own a beautifully preserved golden pyrite ammonite from one of the world’s most celebrated fossil localities.
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