Iridescent Baculite Fossil (Straight Ammonite) Chemical Formula: Cu₂CO₃(OH)₂

Chemical Formula: Cu₂CO₃(OH)₂

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

it left its mark to be recorded in history

it is possible it is further derived from the Latin word "granum" meaning grain or seed

and the Czech Republic

Iridescent Baculite Fossil (Straight Ammonite) Chemical Formula: Cu₂CO₃(OH)₂Size: 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