Cut & Polished Agatized Ammonite Fossils for Sale

Discover the intricate beauty of cut and polished agatized ammonite fossils, hand-selected from the rich fossil beds of Madagascar. These genuine Cretaceous-period ammonites (~65–110 million years old) have been sliced and polished to reveal their stunning inner chambers, now filled with natural agate, calcite, and other vibrant minerals.

Each specimen showcases the classic spiral shape of this extinct marine mollusk, while the polished cross-section exposes the internal chamber patterns, offering a mesmerizing glimpse into the fossilization process. The agatization adds depth and color, creating an eye-catching blend of science and natural art.

Whether you're building a fossil collection, decorating a space, or searching for a one-of-a-kind gift, these agatized ammonites are captivating pieces of Earth’s ancient past.