Promicroceras pyritosum ammonite fossil (17 mm) featured The piece of limestone matrix

The piece of limestone matrix measures 400 mm across and contains dozens of juvenile ammonites

which display some subtle iridescent colours that change depending on the angle that the fossil is viewed at with a bronze sheen

It is clean on both sides and has a beautiful metallic colour and shine

which likely happened when the rock fell from the cliffs to the beach

25 inches) across

Promicroceras pyritosum ammonite fossil (17 mm) featured The piece of limestone matrixA highly pyritised ammonite fossil of the species Promicroceras pyritosum from the world famous Jurassic Coast beach of Charmouth, Dorset UK. The fossil measures 17 mm (0. 68 inches) across. The ammonite is very well preserved on both sides. The ribs are very finely defined and the pyritic colour and shine is beautiful. A great example of the species and incredible in the flesh. These pyrite ammonites have long been used to make beautiful natural