A stunning example of an iridescent calcite multi-ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 190 mm (7.5 inches) tall and contains multiple fossil ammonites, the two biggest measuring around 60 mm (2.36 inches) 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. 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 1040 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.