Rainbow iridescent Psiloceras ammonite fossil display piece 25 4 inches) across and contains

4 inches) across and contains a single partial ammonite that measures 91 mm (3

The matrix measures 380 mm (15 inches) across and the ammonite measures 148 mm (5

making it a juvenile of this species

There is a deep red shine to it with flashes of green and orange on the inner whorls

The shell display some subtle iridescence that changes as the viewing angle changes

Rainbow iridescent Psiloceras ammonite fossil display piece 25 4 inches) across and containsA stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK. The piece of limestone matrix measures 90 mm (3. 6 inches) tall and contains a single ammonite, which measures 62 mm. The ammonite is very well preserved and has been prepared out of the rock to reveal the shell, which displays some stunning iridescent colours that change depending on the angle that the fossil is viewed at. There is a deep