A stunning example of an iridescent multi-ammonite fossil of the species Caloceras johnstoni from North Somerset, UK.
The piece of limestone matrix measures 135 mm (5.32 inches) tall and contains two ammonites, the largest of which measures 24 mm (0.95 inches), making them juveniles of the species.
The ammonites are very well preserved and have been prepared out of the rock to reveal the shells, which display some stunning iridescent colours that change depending on the angle that the fossil is viewed at with red hues dominating.
The shells sit in the original piece of limestone shale matrix in which they were found that has been shaped and has a cut-flat base that allows it to stand by itself for display. It weighs 270 grams.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection. These fossils are preserved in the same way as the more famous Canadian "ammolite", which is turned into valuable gemstones due to the stunning iridescence.