Large iridescent double-Psiloceras ammonite display fossil Marine reptile which is large for this

which is large for this fossil type

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

which likely occurred during the fossilisation process

which is giant for this species and about as big as they get

Large iridescent double-Psiloceras ammonite display fossil Marine reptile which is large for thisA 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