A stunning example of an iridescent multi-ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 80 mm (3.12 inches) wide and contains several ammonites, the largest of which measures 25 mm. The ammonites are very well preserved and have been prepared out of the rock to reveal the shells, which display some stunning iridescent colours that change depending on the angle that the fossil is viewed. Most of the colours of the rainbow are visible in these stunning shells with reds and greens dominating.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.