Red Iridescent Ammonite - Madagascar The shell of aragonite and

The shell of aragonite and conchiolin creates thin layers with lots of color play due to interference of light

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This species of ammonites is characterized by its ribbed shells and white exterior

Red Iridescent Ammonite - Madagascar The shell of aragonite andThe Cleoniceras sp. of ammonites has gained popularity over the years. Many collectors enjoy the brilliant flashes of color that are showcased on its shell. These iridescent colors are caused by light reflecting off layers of fossilized aragonite. The most highly prized specimens are excavated from the Bearpaw Formation in Alberta, Canada. These creatures lived during the Cretaceous Period, specifically around 110 million years ago. Ammonites are an