Rainbow iridescent Caloceras ammonite fossil with encrusting bivalve shell 38mm crinoid 3 inches) tall and the

3 inches) tall and the fossil ammonite measures 20 mm (0

The piece of limestone matrix measures 85 mm (3

A great example of the species and incredible in the flesh

The fossil weighs 830 grams

which is small for this fossil type making it a juvenile

Rainbow iridescent Caloceras ammonite fossil with encrusting bivalve shell 38mm crinoid 3 inches) tall and theA stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The piece of thin limestone matrix measures 128 mm (5. 1 inches) across and contains a single ammonite that measures 38 mm (1. 5 inches), making it a juvenile of this species. The ammonite is very well preserved and has been prepared out of the rock to reveal the shell, which displays some stunning iridescent colours that change depending on