Agate Replaced Shell

Agate-replaced shells are fossilized shells that have been replaced by agate, a variety of chalcedony. Over time, mineral-rich water seeps into the empty spaces within the shell, gradually depositing silica and forming agate. This process preserves the intricate details of the original shell, while the agate gives it vibrant colors and unique patterns, making these fossils both scientifically interesting and visually striking.