Large iridescent double-Psiloceras ammonite display fossil Marine reptile It is slightly distorted and

It is slightly distorted and compressed on one side

The reverse of the piece is covered in stem ossicles that show off the classic five-pointed star-shaped cross section that gives this genus its name

The shell displays some truly stunning multi-coloured iridescence with flashes of red

3 inches) across and contains two ammonites

which likely occurred during the fossilisation process

Large iridescent double-Psiloceras ammonite display fossil Marine reptile It is slightly distorted andA stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK. The piece of limestone matrix measures 140 mm (5. 45 inches) across and contains two complete ammonites, which measure 46 mm and 23 mm. The ammonites are very well preserved and have been prepared out of the rock to reveal the shells, which display some subtle iridescent colours that change depending on the angle that the fossil is viewed