Ammonite Fossil Jewelry in Sterling Silver  

Ancient Marine Fossils Meet Modern Silver Craftsmanship

Ammonites were marine mollusks related to modern nautiluses, and their chambered shells fossilized when sediment burial triggered mineral replacement of the original aragonite structure. Madagascar produces some of the world's most sought-after specimens because volcanic activity there introduced iron and other minerals that created rich color variations. The spiral pattern you see follows the Fibonacci sequence, a mathematical ratio the animal used to build its shell chamber by chamber over its lifespan. Our ammonite fossil jewelry arrives set in solid .925 sterling silver, with settings designed to protect the fossil surface while displaying its natural pattern. Fossil hardness varies by mineral content, but most ammonite specimens register between 4 and 7 on the Mohs scale depending on replacement minerals. We recommend storing these pieces separately from harder gemstones to preserve their polish. SilverRush Style has offered natural stone jewelry since 2005, with free shipping on all US orders. Browse our ammonite collection to find pendants, earrings, and rings that carry genuine prehistoric material.