A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 185 mm (7.28 inches) across and the ammonite measures 70 mm, which is about as big as this species gets. The ammonite is perfectly preserved and has been prepared out of the rock to reveal the shell, which displays some nice subtle red iridescent colours that change depending on the angle that the fossil is viewed at. The fossil weighs 630 grams and has a cut flat base to allow it to stand freely for display. A very impressive display fossil.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.