5.5" Madagascar Ammonite

This 5.5-inch Cleoniceras ammonite from Madagascar is a real showstopper. Its shell has been carefully polished to bring out the natural beauty hidden inside, revealing swirling, leaf-like patterns that look almost artistic. The intricate chamber lines and mineralization catch the light in a way that makes this piece feel alive, even though it’s been frozen in time for over 100 million years. It’s the kind of fossil that doesn’t just sit on a shelf—it starts conversations.

Ammonites were ocean-dwelling relatives of squid and octopus, drifting through ancient seas in their spiral shells. They lived all around the world for hundreds of millions of years before disappearing with the dinosaurs. Madagascar is especially famous for producing ammonites like this, with shells so beautifully preserved that they polish into natural works of art. Holding one is like holding a piece of the ocean’s memory.