Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
Stunning green multi-coloured iridescent Caloceras display ammonite
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Stunning green multi-coloured iridescent Caloceras display ammonite

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A stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK.

The matrix measures 110 mm (4.3 inches) tall and the ammonite measures 98 mm, which is large for this species. The shell sits in the original limestone matrix in which it was found that has been shaped and has a cut-flat base to allow it to be displayed freely standing. The ammonite is very well preserved and has been prepared out of the rock to reveal the shell. The shell displays some beautiful multicoloured iridescence with different green, blue, and copper that appear as the viewing angle changes. This one really has spectacular colours. 

These fossils are highly sought after and very hard to find, especially complete like this. They are preserved in the same way as the famous Canadian "Ammolite" ammonites that are turned into valuable gemstones. The fossil weighs 200 grams.

Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.