Iridescent Baculite Fossil (Straight Ammonite) Rutilated Quartz is a variety

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

45 ozFossil Type & Species: Trace Fossil & "Grallator"Location: Portland Formation

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

While these geodes come in many different sizes

the strontium sulfate left behind began to form crystals

Iridescent Baculite Fossil (Straight Ammonite) Rutilated Quartz is a varietySize: 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