A stunning example of an iridescent multi-ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 62 mm (2.45 inches) across and contains two small ammonites, which measure 20 mm and 16 mm, making them tiny juveniles of the species. It is rare to get two brightly coloured juveniles of this species together in one rock.
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 at. There is a lovely mix of red, orange, and gold colours in the shell.
The shell sits in the original thin piece of limestone shale matrix in which it was found that does not stand on its own. It weighs 18 grams.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection. These fossils are preserved in the same way as the more famous Canadian "ammolite", which is turned into valuable gemstones due to the stunning iridescence.