A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 90 mm (3.55 inches) tall and contains one ammonite, which measures 75 mm (2.95 inches). The ammonite is well preserved and has been prepared out of the rock to reveal the shell, which display some nice subtle rainbow iridescent colours that change depending on the angle that the fossil is viewed at with a nice red sheen. The fossil weighs 80 grams and has a plaster wedge on the back with 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.