Stunning red-iridescent Caloceras ammonite
Stunning red-iridescent Caloceras ammonite
Stunning red-iridescent Caloceras ammonite
Stunning red-iridescent Caloceras ammonite
Stunning red-iridescent Caloceras ammonite
Stunning red-iridescent Caloceras ammonite
Stunning red-iridescent Caloceras ammonite
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Stunning red-iridescent Caloceras 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 56 mm (2.2 inches) across and contains a partial ammonite. The shell sits in the original limestone matrix in which it was found that has been shaped for display. The ammonite is well preserved and has been prepared out of the rock to reveal the whole shell, which displays stunning iridescence, showing many different colours that change as the angle of light changes, with red and copper colours dominating. It has a cut-flat base to allow it to stand freely for display purposes.

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 65 grams.

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