Stunning big rainbow iridescent Caloceras display ammonite fossil (78mm) crinoid which sank to the seafloor

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

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

25 inches) across and contains half an ammonite shell that measures 90 mm (3

These pyrite ammonites have long been used to create natural jewellery and look amazing in the flesh

Stunning big rainbow iridescent Caloceras display ammonite fossil (78mm) crinoid which sank to the seafloorA 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