Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
Stunning rainbow iridescent Caloceras ammonite display fossil
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  • Load image into Gallery viewer, Stunning rainbow iridescent Caloceras ammonite display fossil
  • Load image into Gallery viewer, Stunning rainbow iridescent Caloceras ammonite display fossil
  • Load image into Gallery viewer, Stunning rainbow iridescent Caloceras ammonite display fossil
  • Load image into Gallery viewer, Stunning rainbow iridescent Caloceras ammonite display fossil
  • Load image into Gallery viewer, Stunning rainbow iridescent Caloceras ammonite display fossil
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Stunning rainbow iridescent Caloceras ammonite display fossil

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

The matrix measures 178 mm (7 inches) across and contains a single partial ammonite, which measures 84 mm ( a good size for this species). The shell sits in the original limestone matrix in which it was found. The ammonite is very well preserved and has been prepared out of the rock to reveal the shell, which displays some truly stunning multi-coloured iridescence with most of the colours of the rainbow appearing as the viewing angle changes. The matrix has a cut-flat base to allow it to stand freely for display. 

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 312 grams.

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