A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 158 mm (6.15 inches) wide and contains two ammonites, the largest of which measures 44 mm. The ammonites are well preserved and have been prepared out of the rock to reveal the shells, which display some nice subtle iridescent colours that change depending on the angle that the fossil is viewed at with a nice red sheen. The fossil weighs 330 grams and has a cut flat base 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.