Description
Rare Golden Pyrite Ammonite Fossil – Tropidoceras sp.
Lower Jurassic – Black Ven Marls – Charmouth, Lyme Regis, Dorset, UK
This exquisite fossil ammonite, identified as Tropidoceras, is beautifully preserved in a distinctive golden pyrite form, making it a stunning piece for any fossil enthusiast or collector.
Species Information: Tropidoceras was an ammonite genus that lived during the early Jurassic period, around 190 million years ago. This genus is particularly renowned for its elegantly ribbed and well-defined coils, with a distinctive ornamentation that makes each specimen uniquely attractive and desirable among collectors.
Geological Background: This specimen comes from the famous Black Ven Marls formation, located along the Jurassic Coast at Stonebarrow Cliff, Charmouth, near Lyme Regis in Dorset, UK. The Black Ven Marls are internationally famous for yielding exceptional ammonite fossils preserved in iron pyrite, popularly known as “fool’s gold.” These fossils form through a unique geological process called pyritisation, in which organic material is replaced by iron sulfide, creating a metallic gold appearance.
Detailed Geological Information:
- Geological Formation: Black Ven Marls
- Geological Age: Lower Jurassic (Lower Lias) – approximately 190 million years old
- Location Found: Stonebarrow Cliff, Charmouth, Lyme Regis, Dorset, UK
Discovery and Preparation: Your specimen was carefully discovered by our expert fossil-hunting team members, Alister and Alison, on the 2nd of March, 2025. It has been meticulously cleaned, prepared, and preserved by Alison to bring out its natural beauty and intricate detail.
Authenticity Guarantee:
- 100% Genuine Fossil Specimen
- Includes a signed Certificate of Authenticity.
- Scale cube = 1cm (Please see detailed photo for precise dimensions)
- The photograph provided shows the exact fossil specimen you will receive, ensuring complete confidence in your purchase.
Provenance: This fossil is from the renowned Alice Purnell Collection, well-known among collectors for quality and authenticity.
Whether as a thoughtful gift, educational resource, or centerpiece for a fossil collection, this stunning Tropidoceras ammonite fossil from the famous Jurassic Coast of Dorset is an exceptional example of Earth’s ancient marine life.





Reviews
There are no reviews yet.