Ammolite

From ancient fossil to
a magnificent gemstone

From Fossil to Gem

Ammolite is a rare gemstone made from the fossilized shells of ammonites. These shells create a natural gemstone with shimmering, iridescent colors that make it highly prized.  Because of its beauty and rarity, ammolite is recognized as one of the few organic gemstones in the world, alongside amber and pearl.

ammonite
Ammolite is a rare gemstone made from the fossilized shells of ammonites

Ancient Creatures of the Ocean

Ammonites were marine creatures, related to squids, that lived inside coiled shells. They thrived hundreds of millions of years ago, when the Earth had only one supercontinent called Pangea, and the surrounding global ocean known as Panthalassa. Their elegant spiral shells, often preserved as fossils, are among the most recognizable symbols of prehistoric marine life.

Extinction and Fossilization

About 66 million years ago, ammonites, along with dinosaurs, became extinct after the impact of a massive asteroid. Their shells, preserved over time, eventually formed the gemstone we know today as ammolite. This transformation from ancient life to brilliant gemstone makes ammolite a rare link between Earth’s history and natural beauty.

Ammonite fossils can be discovered in many places around the world

Where ammolite Is Found

Ammonite fossils can be discovered in many places around the world, including Utah, England, Morocco, and Madagascar. However, the only location that produces gem-quality ammolite in commercial amounts is southwestern Alberta, Canada. This region’s unique geological conditions created the vivid colors and quality that make Canadian ammolite famous worldwide.

Colors and Value

Ammolite most commonly appears in shades of green and red, while blue and violet are much rarer and considered more valuable. The most prized stones are those that display a wide spectrum of colors. Collectors and jewelers often refer to these multicolored specimens as “full-spectrum” ammolites, and they are especially sought after for their striking beauty.

Ammolite most commonly appears in shades of green and red

Characteristics of ammolite

Ammolite ranks only 3.5 on the Mohs scale of hardness, which makes it relatively soft and fragile. To improve durability, it is often cut and polished into doublets or triplets. This treatment allows the gemstone to be worn safely in jewelry while still showcasing its vivid play of colors.

Doublets and Triplets

A doublet is made by attaching a thin layer of ammolite to a backing material such as black shale, black onyx, or glass. A triplet adds an extra transparent layer, often synthetic spinel or quartz, on top for additional protection. These methods not only strengthen the gemstone but also enhance its brilliance, making it more suitable for everyday wear.

A doublet is a thin slice of ammolite placed on a backing like shale, onyx, or glass.

Uses of ammolite

Ammolite is admired both as a gemstone for jewelry and as a decorative object d’art. Its unique fossil origin and dazzling play of colors make it one of the most fascinating gemstones on the market. Because each piece is truly one of a kind, ammolite is often collected not only for its beauty but also for its rarity and connection to Earth’s ancient past.

How to Clean ammolite

The safest way to care for ammolite is to wipe it gently with a damp, soft, non-abrasive cloth. Avoid chemicals, ultrasonic cleaners, and excessive heat to keep its colors vivid and long-lasting. Proper care ensures that this delicate gemstone retains both its brilliance and its durability for many years.

jewelry cleaning
Gently wipe ammolite with a damp, soft cloth

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