Polished ammonites in pair 3-5 cm
Ammonites (Ammonoidea) are extinct cephalopods that lived from the Devonian to the Cretaceous periods, famous for their spiral-coiled, chambered shells with complex suture lines. These index fossils are vital for dating marine strata and are prized by collectors for their exceptional preservation in pyrite, calcite or mother-of-pearl (aragonite). Their geometric design, based on the golden ratio, makes them icons that blend biological perfection with natural aesthetics.
