A huge example of a highly pyritised ammonite fossil of the species Eoderoceras (Eteoderoceras) armatum from the world-famous Jurassic Coast beach of Charmouth, Dorset UK.
The fossil measures 100 mm (3.92 inches) across, which is very large for this fossil type. The ammonite is very well preserved in pyrite on both sides and has good detail in the ribbing and suture lines. Large examples of this species are some of the most sought-after pyrite fossils and are hard to find. A beautiful fossil that is full of detail. It weighs 305 grams.
These large Eoderoceras ammonites are often called the "king of pyrites" as they are the largest and most impressive pyrite ammonites found on the Jurassic Coast.
Around 196 million years old, this fossil would make a wonderful addition to any collection.