A nice 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 80 mm (3.12 inches) across, which is large for this species of ammonite. The suture lines are clearly visible and striking and the ribs are well defined. It is not perfectly preserved and has some parts of the shell missing - these were not preserved in the first place. Several cracks in the fossil have been stabilised with glue but it is stable. It has a nice pyritic/metallic colour and shine. These are very popular ammonites but are becoming hard to find due to lack of erosion of the right layers in the cliffs.
Around 196 million years old, this fossil would make a wonderful addition to any collection.