A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 102 mm (4 inches) wide and contains an ammonite, which measures 58 mm. The ammonite is well preserved and has been prepared out of the rock to reveal the shell, which displays some nice iridescent colours that change depending on the angle that the fossil is viewed at with a nice red sheen. The fossil weighs 65 grams. The rock matrix is thin. Please note - this fossil does not stand freely on its own.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.