Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
Large iridescent multi-Caloceras display ammonite
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Large iridescent multi-Caloceras display ammonite

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

The matrix measures 270 mm (10.65 inches) across and contains multiple ammonites preserved on both sides of the rock. The shells sit in the original limestone matrix in which they were found. The ammonites are very well preserved and have been prepared out of the rock to reveal the details of the shells. The shells display some beautiful iridescence with flashes of red, copper, and green that appear as the viewing angle changes.

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 785 grams.

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