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Around 196 million years old
The piece of limestone matrix measures 105 mm (4
It is preserved in calcite and has been coated in a reversible (soluble) lacquer for protection
The fossil measures 55 mm (2
Perfect Promicroceras pyritosum ammonite fossil (21 mm) crinoid Around 196 million years oldA highly pyritised ammonite fossil of the species Promicroceras pyritosum from the world famous Jurassic Coast beach of Charmouth, Dorset UK. The fossil measures 20. 5 mm (0. 8 inches) across, which is a good size for this species. 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. A really impressive specimen.
