Large 97mm rainbow iridescent Caloceras display ammonite fossil

This is a large, well-preserved Caloceras johnstoni ammonite fossil with iridescent colors and a geological fault, measuring 172 mm across the matrix and 97 mm for the ammonite itself.

• The ammonite is very well preserved and has been prepared to reveal its iridescent shell.
• It is highly sought after and rare, especially large complete examples.