A stunning example of a calcite ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 150 mm (5.9 inches) wide and the fossil ammonite measures 72 mm (2.85 inches) across, which is large for this species. 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. The fossil weighs 1285 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.