Is Ammolite a real gemstone a fossil?

The short answer is: It’s both! Ammolite occupies a very rare space in the gemological world where biology and geology shake hands.

To help you give your blog readers the full picture, here is the breakdown of why it qualifies as both a fossil and a high-end gemstone:

1. It is a Fossil (The Origin)

At its core, Ammolite is the fossilized shell of Ammonites (Placenticeras meeki and Placenticeras intercalare). These were squid-like creatures that lived in the Western Interior Seaway roughly 70 to 75 million years ago. While most fossils turn into dull rock (permineralization), these specific shells underwent a unique preservation process in the Bearpaw Formation of Alberta, Canada, keeping their original aragonite structure intact.

2. It is an "Organic Gemstone" (The Status)

In 1981, the World Jewellery Confederation (CIBJO) officially recognized Ammolite as a true gemstone. It belongs to a very elite club called Organic Gemstones, which are gems produced by living organisms. There are only three primary members of this club:

• Amber (fossilized tree resin)

• Pearl (created by mollusks)

• Ammolite (fossilized prehistoric shell)

3. Why the Distinction Matters

What upgrades it from "just a fossil" to a "gemstone" is its iridiscence. While you can find ammonite fossils all over the world, only the specimens found in a tiny pocket of Southern Alberta have the specific thickness and layering of aragonite to create the "rainbow" effect.

Because it is finite, rare, and possesses incredible "play-of-color" (similar to Opal), it is mined, cut, polished, and graded just like a diamond or emerald.