A stunning 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 90 mm (3.5 inches) across with matrix which is large for this species. The ammonite is beautifully preserved on both sides attached to a pyrite matrix that is part of the outer whorl. The ribs are very finely defined and the colour is beautiful. There is also a small juvenile ammonite of the same species on one side of the main ammonite. A great example of the species. These ammonites are becoming harder to find these days. This one is a real beauty.
Around 196 million years old, this fossil would make a wonderful addition to any collection