Psiloceras From Great Britain (2.2 inches wide)

Here is a 2.2 inch wide Psiloceras planorbis ammonite from Great Britain. It has a naturally iridescent shell showing nice blues, greens and deep red colors. Like most fossils from the Blue Lias Formation, these ammonites have been compressed and flattened by the same geological processes of heating and pressure which gives them their iridescent shell.