Stunning big rainbow iridescent Caloceras display ammonite fossil (78mm) crinoid This is a relatively uncommon

This is a relatively uncommon species at this size and condition

which displays some beautiful subtle iridescence with flashes of different colours appearing as the viewing angle changes

The two pieces of rock combined weigh 4

which sank to the seafloor and was preserved in the soft mud

56 inches) across with matrix

Stunning big rainbow iridescent Caloceras display ammonite fossil (78mm) crinoid This is a relatively uncommonA stunning example of an iridescent ammonite fossil of the species Caloceras johnstoni from North Somerset, UK. The matrix measures 96 mm (3. 75 inches) across and contains an ammonite that measures 78 mm (3. 1 inches), which is large for this species. The ammonite sits in the original limestone matrix in which it was found that has been shaped and has a cut flat base allowing it to be displayed freely standing by itself. The ammonite is very well