A stunning example of an ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 122 mm (4.82 inches) tall and the fossil ammonite measures 90 mm (3.5 inches) across, which is very large for this species and about as big as they get. The ammonite is well preserved and has been prepared out of the rock to reveal the whole shell. The shell displays some nice subtle iridescent colours with dark red and rainbow flashes when the angle the fossil is viewed from changes. The colours on this example are particularly bright and saturated for this species. The fossil weighs 510 grams and has a cut-flat base to allow it to stand freely for display. These ammonites make wonderful display items and are real conversation starters.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.