Huge complete subtly iridescent Caloceras display ammonite fossil (148 mm) crinoid The ammonite was found in

The ammonite was found in a piece of limestone that was split open to reveal the both the positive cast of the ammonite and the negative impression of the shell

75 inches) across

The neural and rib facets are present and well preserved

The fossil weighs 768 grams

Huge complete subtly iridescent Caloceras display ammonite fossil (148 mm) crinoid The ammonite was found inA stunning and perfect example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The matrix measures 380 mm (15 inches) across and the ammonite measures 148 mm (5. 8 inches), which is huge for this species and as big as it gets. The shell sits in the original limestone matrix in which it was found that has been shaped for display. The ammonite is very well preserved and has been prepared out of the rock to