A stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK.
The matrix measures 210 mm (8.25 inches) across and contains two complete ammonites that measure 57 mm and 52 mm. It is very unusual to find a piece with more than one complete ammonite of this species in.
The shells sit in the original limestone matrix in which they were found that has been shaped and has a cut-flat base to allow it to be displayed freely standing. The ammonites are very well preserved and have been prepared out of the rock to reveal the full shells, which display some beautiful iridescence with colours that change as the viewing angle changes, with copper and gold colours dominating. The whole piece weighs 1025 grams.
These fossils are highly sought after and very hard to find. They are preserved in the same way as the famous Canadian "Ammolite" ammonites that are turned into valuable gemstones. These fossils make great unusual gifts and each one is totally unique.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.