Ammonite Fossil Rings in Sterling Silver  

Ancient Marine Fossils Set in .925 Sterling Silver

Ammonite fossils form when ancient marine mollusks become buried in sediment and mineral-rich water replaces their organic material over millions of years. The replacement minerals determine each fossil's final appearance—iron creates red and orange tones, while copper produces green and blue hues. Madagascar, Morocco, and Canada supply most jewelry-grade specimens, with Madagascan ammonites often displaying iridescent flash from aragonite crystal layers. The characteristic spiral shape follows a logarithmic pattern called the golden ratio, which the animal built chamber by chamber throughout its life. Larger chambers near the opening indicate the creature's final growth stages. When set in sterling silver, these geometric forms create rings with natural mathematical precision that no synthetic design replicates. SilverRush Style has offered real natural stone jewelry since 2005, with free shipping on all US orders. Each ammonite fossil ring ships with the stone you see photographed, so you select the specific prehistoric specimen you want to wear.