A stunning example of an iridescent multi-ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 200 mm (7.87 inches) tall and contains multiple fossil ammonites, the two biggest measuring 62 mm and 53 mm across, which is large for this species. The ammonites are well preserved and have been prepared out of the rock to reveal the whole shells, which display some beautiful iridescent colours that show all of the colours of the rainbow and change depending on the angle that the fossil is viewed at. This type of shell preservation is the same as the Canadian gemstone "Ammolite", which is highly sought after. The fossil weighs 750 grams and a cut-flat base and plaster wedge to allow it to stand freely for display.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.