Goniatite Fossil – Polished Ammonite Ancestor

Hold 370 million years of Earth's history in the palm of your hand. Goniatites are ancient cephalopod fossils — predecessors to the more familiar ammonite — that lived during the Devonian and Carboniferous periods. Each polished specimen reveals the fossil's distinctive geometric suture patterns, ranging from angular zigzag lines to intricate star-like formations pressed into dark stone.

These goniatites measure approximately 1 to 1.25 inches in diameter, making them ideal pocket fossils, desk specimens, or additions to any fossil or mineral collection. Their compact size and striking natural geometry make them a favorite among collectors and geology enthusiasts of all ages.

Product Details

• Fossil type: Goniatite (ancient cephalopod)
• Age: Approximately 370 million years old (Devonian–Carboniferous period)
• Size: Approximately 1–1.25 inches in diameter
• Finish: Polished to reveal suture patterns
• Color: Dark gray to black stone with lighter fossil detail
• Quantity: One goniatite fossil
• Natural variation in suture pattern, shape, and surface expected

About Goniatites

Goniatites are an extinct group of ammonoid cephalopods that thrived in ancient seas long before the dinosaurs. Their distinctive angular suture lines — the seams between internal chambers — set them apart from later ammonites and make each specimen a miniature geometric work of art. They are found in sedimentary rock formations around the world, with notable deposits in Morocco, Germany, and North America.