A stunning example of an iridescent multi-ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 160 mm (6.3 inches) wide and contains multiple fossil ammonites, the biggest measuring 31 mm. The ammonites are well preserved and have been prepared out of the rock to reveal the whole shells. The shell displays 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 945 grams and has two cut flat bases to allow it to stand freely for display in multiple ways.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.