This Hexagonaria Coral Fossil is a striking example of ancient marine life preserved in stone. Hexagonaria is an extinct genus of colonial rugose coral that lived in warm shallow seas during the Devonian period approximately 350 million years ago. As the coral colonies grew, they formed tightly packed hexagonal patterns that are beautifully revealed in fossil form.
These fossils are most famously known for forming Petoskey stones, the official state stone of Michigan. Specimens are commonly found within the Traverse Group rock formations, where Devonian age limestone preserved these corals in remarkable detail. Each fossil displays a natural honeycomb pattern created by the original coral polyps, offering a direct glimpse into prehistoric reef ecosystems.
Each specimen is natural and one of a kind. Photos are representative of the material, but variations in color, pattern clarity, and shape should be expected. Multiple sizes are available. Please use the menu to select from the available options.
This fossil makes an excellent educational specimen, display piece, or addition to any fossil or geology collection.
