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 (3.52 inches) across, which is large for this species. It is beautifully preserved on both sides and is matrix free. The suture lines are clearly visible and very striking and the detail in the ribs is very good. It has a lovely pyritic golden colour and shine. There has been some minor repair to a crack in the outer whorl (see close-up photo). 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. This one is a chunky and heavy ammonite, weighing 250 grams.
Around 196 million years old, this fossil would make a wonderful addition to any collection.