A stunning example of an iridescent ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The piece of limestone matrix measures 175 mm (6.9 inches) wide and has been split open to reveal the positive and negative sides of two ammonite shells, the largest of which measures 70 mm across (large for this species). The ammonites are very well preserved and have been prepared out of the rock to reveal the detail and colours. They display some stunning iridescence with the colours changing depending on the angle that the fossil is viewed at. Reds, coppers, and greens flash up on these ones.
The two rocks weigh 945 grams and fit back together as one so they can be opened to reveal the ammonites inside as a surprise. They both have cut flat bases to allow them to stand freely for display. These ones make great display pieces or would work as unusual bookends!
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.