Iridescent Baculite Fossil (Straight Ammonite) Anatase is a form of

Anatase is a form of titanium dioxide

The Gingko genus is one of the oldest living ones found on Earth today

These dendrites are branches of manganese crystals that have grown out and over the surface of their host rock

Rutilated Quartz is a variety of quartz that contains inclusions of rutile

flat stone

Iridescent Baculite Fossil (Straight Ammonite) Anatase is a form ofSize: 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