Iridescent Caloceras display ammonite
Iridescent Caloceras display ammonite
Iridescent Caloceras display ammonite
Iridescent Caloceras display ammonite
Iridescent Caloceras display ammonite
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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 140 mm (5.5 inches) wide and the ammonite measures 80 mm. The shell sits in a piece of limestone matrix 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 subtle silvery iridescence with flashes of red and orange that appear as the viewing angle changes.

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. The fossil weighs 400 grams.

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