A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 170 mm (6.7 inches) wide and the fossil ammonite measures 40 mm (1.55 inches) across. 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 a a dark-red sheen. There is also a second partial ammonite in the matrix. The fossil weighs 650 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.