Iridescent Baculite Fossil (Straight Ammonite) it left its mark to

it left its mark to be recorded in history

nephrite and jadeite

This means it forms with no true crystal structure

also known as flurospar

This mineral is most commonly found colorless or with slightly warm hues

Iridescent Baculite Fossil (Straight Ammonite) it left its mark toSize: 2. 2 x 1. 1 x 0. 6 in. Weight: 1. 6 oz. Here is a fossil that is not often seen in your everyday fossil collection. It is the iridescent shell of a Baculite. This is an extinct cephalopod that lived during the Cretaceous Period. They are related to the more popular ammonite. However, their shells were straight instead of coiled. The shell of aragonite and conchiolin creates thin layers with lots of color play due to interference of light. You