Subtly green iridescent Caloceras display ammonite crinoid It is preserved in limestone

It is preserved in limestone with no pyrite and has been backed with a rock-coloured plaster to make it strong and stable

The fossil weighs 195 grams and has a cut flat base to allow it to stand freely for display

The fossil measures 80 mm (3

There is also a rare bivalve shell that attached itself to the ammonite when it was lying on the seafloor before being fossilised

This is a relatively uncommon species at this size and condition

Subtly green iridescent Caloceras display ammonite crinoid It is preserved in limestoneA stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The matrix measures 123 mm (4. 95 inches) across and contains an ammonite that measures 81 mm (3. 2 inches) across, which is large for this species. The shell sits in the original limestone matrix in which it was found that has been shaped and has a cut flat base to allow it to stand freely by itself for display. The ammonite is very well