Look at these beautiful Opalized Ammonite fossil specimens found in Madagascar! What causes the beautiful rainbow of colors? How old are they on average?

Opalized Ammonite fossils found in Madagascar are truly a sight to behold. These stunning specimens showcase a mesmerizing rainbow of colors that captivate fossil enthusiasts and collectors alike. But what exactly causes these beautiful hues to appear, and how old are these fossils on average?

The Formation Process

The vibrant colors seen in Opalized Ammonite fossils are a result of the process of opalization. Opal is a mineraloid formed from silica-rich solutions that seep into the cavities of the ancient Ammonite shells. Over time, the silica hardens and forms opal, creating a stunning play of colors known as iridescence. This iridescence is caused by the diffraction of light as it passes through the layers of opal, resulting in a rainbow-like effect that changes with the angle of observation.

The Age of Opalized Ammonite Fossils

Opalized Ammonite fossils found in Madagascar are estimated to be around 70 to 110 million years old on average. These fossils date back to the Cretaceous period when Ammonites, an extinct group of marine mollusks, thrived in the ancient seas. The process of opalization occurred over millions of years as the shells were buried and fossilized, eventually transforming into the stunning specimens we see today.

Opalized Ammonite fossils are not only beautiful to look at but also hold valuable scientific and historical significance. They provide insights into the ancient marine ecosystems and the geological processes that have shaped the Earth over millions of years. Whether you are a seasoned fossil collector or simply appreciate the beauty of nature's wonders, Opalized Ammonite fossils from Madagascar are sure to leave you in awe.