Beautiful, 1.60" Silver Iridescent Ammonite - Madagascar

Add a brilliant piece of Earth’s history to your collection with this genuine Silver Iridescent Ammonite fossil from Madagascar! Measuring 1.60" across, this captivating fossil shimmers with natural rainbow hues formed over 110 million years ago during the Middle Cretaceous period. These rare ammonites are preserved in a stunning nacreous layer that reflects vibrant colors under light—no artificial enhancement needed.

Sourced from the fossil-rich Mahajanga Province of Madagascar, this ammonite belongs to the species: various group and showcases the classic spiral shell structure that once housed an ancient marine cephalopod. It’s professionally presented in a labeled display case, making it perfect for collectors, fossil enthusiasts, or as a one-of-a-kind gift.

Whether you're into natural history, geology, or unique home decor, this iridescent ammonite brings prehistoric beauty into the modern world. Every fossil is authentic, ethically sourced, and hand-selected for quality and color.

Bring home a shimmering relic from the age of dinosaurs—limited availability!

🌀 About Iridescent Ammonites and Silver Ammonite Fossils

Ammonites are one of the most recognizable and beautiful fossils in the world — extinct marine cephalopods that lived in Earth’s oceans for hundreds of millions of years. These spiral-shelled creatures thrived from the Devonian period through the Cretaceous period, disappearing around 66 million years ago during the same mass extinction event that ended the age of dinosaurs.

What makes certain ammonites truly exceptional, however, is their natural iridescence — a stunning, rainbow-like shimmer that can appear in preserved shells. Among the rarest and most striking are silver iridescent ammonites, which exhibit a radiant, metallic sheen that reflects silver tones (and often hints of blue, purple, and green) across the fossil’s surface. This dazzling effect is caused by microscopic layers of aragonite, a mineral that refracts light in thin layers, much like mother-of-pearl.

These breathtaking fossils are not only scientifically fascinating but also visually stunning, making them highly prized by collectors, museums, and even jewelry designers.

Where Are Iridescent Ammonite Fossils Found?

Iridescent ammonites are found in only a few highly specific geological environments, where the right balance of mineral content, pressure, and preservation conditions allowed for the delicate nacreous layer to survive fossilization.

Top sources of silver iridescent ammonites include:

• Madagascar – Cretaceous-era ammonites from the Mahajanga Basin are famous for vibrant coloration, including silvery iridescence.
• Canada (Alberta) – The Bearpaw Formation produces Ammolite, a gem-grade form of fossil ammonite with exceptional iridescence.
• Morocco – Jurassic and Cretaceous ammonites from Morocco may occasionally display rare silver tones.
• Russia – Certain fossil sites yield beautifully preserved ammonites with delicate, metallic luster.

These fossils are typically polished on one or both sides to reveal the full beauty of their shell structure and iridescent layers.

What Makes an Iridescent Ammonite Valuable?

Several factors contribute to the value and collectibility of silver iridescent ammonites:

• Iridescence Quality: Strong, broad-spectrum shine with full or partial rainbow effects increases value — especially if silver tones dominate.
• Completeness: Fully intact, unbroken ammonite shells with a clear spiral form are highly desirable.
• Size and Shape: Larger specimens with symmetrical coils and thick outer whorls are prized.
• Color Contrast: Fossils that show color against a dark matrix or contrasting background have greater visual appeal.
• Natural vs. Polished: Polished ammonites are popular for display, but natural, unpolished iridescence is more rare and collectible.

Because of their aesthetic quality, some ammonites cross over into the gemstone and jewelry market, increasing demand and rarity for top-grade specimens.

Why Collect Silver Iridescent Ammonite Fossils?

These fossils offer a perfect fusion of science and natural beauty — a treasure that’s both ancient and artistic. Whether you're a fossil enthusiast, gem collector, or nature lover, a silver iridescent ammonite fossil is a captivating addition to any collection.

• Display-Worthy: These fossils are striking decor pieces, glowing with ancient elegance and metallic shimmer.
• Educational Value: Ammonites are a textbook example of extinction, evolution, and marine paleontology.
• Collector Appeal: Their rarity, color, and preservation quality make them incredibly sought after.
• Unique Gift: Few gifts match the beauty and history of an authentic, shimmering ammonite fossil.

Guaranteed Authenticity

At Fossil Driven, we guarantee every iridescent ammonite fossil we sell is 100% authentic — formed naturally over millions of years and responsibly sourced. We never deal in synthetic or artificially colored ammonites. All polishing (if any) is disclosed, and every specimen is inspected for quality, integrity, and genuine preservation.

Bring home an ancient ocean relic — a silver iridescent ammonite that’s as old as the dinosaurs and as dazzling as a gemstone.