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 107 mm (4.2 inches) across with matrix which is very large for this species. It is beautifully preserved on both sides (perfect to the centre on one) with a pyrite matrix made up of the crushed outer whorl (body chamber) of the shell. The suture lines are clearly visible and very striking and the detail in the ribs is very good. Some of the much sought after spines are also still present. It has a lovely pyritic golden colour and shine. These ammonites are very hard to find these days due to lack of erosion in the correct layers of the cliffs, and they are getting very sought after.
Around 196 million years old, this fossil would make a wonderful addition to any collection