Huge Promicroceras pyritosum ammonite fossil (29 mm) pyrite that has been split open

that has been split open to reveal both the positive and negative parts of the shell

The ammonite is very well preserved on both sides

There is also a rare bivalve shell that attached itself to the ammonite when it was lying on the seafloor before being fossilised

75 inches) across and contains an ammonite that measures 78 mm (3

The fossil measures 112 mm (4

Huge Promicroceras pyritosum ammonite fossil (29 mm) pyrite that has been split openA highly pyritised ammonite fossil of the species Promicroceras pyritosum from the world famous Jurassic Coast beach of Charmouth, Dorset UK. The fossil measures 29 mm (1. 15 inches) across, which is giant for this species and about as big as they get. The ammonite is very well preserved on both sides, which is rare for a specimen of this size. The ribs are very finely defined and the pyritic colour and shine is beautiful. A great example of the