Large popped Psiloceras display ammonite fossil pyrite The piece of limestone matrix

The piece of limestone matrix measures 92 mm (3

It is preserved in calcite with no pyrite and was found in multiple pieces that have been repaired back together

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

8 inches) across with matrix

Large popped Psiloceras display ammonite fossil pyrite The piece of limestone matrixA stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK. The matrix measures 95 mm (3. 7 inches) wide and the ammonite measures 75 mm (2. 95 inches), which is large for this species. It is preserved in one of two pieces of shale which was split open perfectly to reveal both the positive (shell) and negative (impression) of the fossil. This is very unusual with these fossils as they don't normally