A stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK.
The matrix measures 51 mm (2 inches) tall and contains two small ammonites that measures 24 mm (0.95 inches) and 12 mm (0.5 inches), making them both small juveniles of this species. The whole piece weighs 62 grams.
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 shells, which displays some beautiful iridescence that changes as the viewing angle changes. the larger of the two ammonites is red and gold and the smaller is a deep green.
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.