Distinctive Pseudosonneratia Ammonite

Description: This fine ammonite is Psedosonneratia from Madagascar which has nearly all of the original iridescent shell present. This is a consequence of light passing through the various layers of aragonite and conchiolin deposited by the ammonite in life. The lack of acidity in the depositional environment allowed them to be preserved as you see it here. Notice the play of colors when the viewer’s aspect changes. The rich rose/bronze color and distinctive ribbing make this a most unusual example, and the ONLY one I have to offer.