KORITE's Grading Guide for Canada's Ammolite

Ammolite is more than just a gemstone—it's a geological treasure and a dazzling testament to nature’s artistry. Found only in Alberta, Canada, this rare gem is renowned for its vibrant play of colors, rich cultural history, and unmatched exclusivity. But what truly sets Ammolite apart from other gemstones is its unique grading system, designed specifically to capture the distinctive features of this one-of-a-kind stone.

Whether you’re a collector, wholesaler, or first-time buyer, this guide will help you appreciate Ammolite’s beauty, understand its grading, and recognize its rarity in today’s gemstone market.

What Makes Ammolite One of the Rarest Gemstones in the World?

Unlike most gemstones, Ammolite is found exclusively in the Bearpaw Formation of southern Alberta, a formation created by ancient seabeds over 70 million years ago. It originates from the fossilized shells of ammonites, marine mollusks that existed during the Late Cretaceous period.

This limited geographic range, combined with its fragile composition, makes Ammolite an exceptionally rare gemstone. Unlike diamonds, emeralds, or rubies, whose mines span continents, Ammolite’s supply is tightly restricted, with less than 5% of mined material being of gem-quality.

To put this into perspective: every piece of Ammolite is as much a piece of natural history as it is a treasure. Add to that its increasing popularity in Feng Shui practices and fine jewellery, and it’s clear why Ammolite is considered one of the rarest and most coveted gemstones in the world.

The Unique Grading System of Ammolite

Ammolite’s grading system stands apart from any other gemstone grading system in the world. Unlike diamonds, which are evaluated based on the “Four Cs” (cut, clarity, carat, and colour), Ammolite is graded based on its colour range, brightness, and clarity—criteria that highlight its distinct iridescence and organic origin.

Standard Grade Ammolite Stone

Standard-grade Ammolite is an ideal choice for those looking to own a piece of this extraordinary gemstone at an accessible price point:

• Color Range: Primarily features one or two colours, such as warm reds or golden greens.
• Brightness: More subtle iridescence compared to higher grades.
• Clarity: Visible inclusions or natural surface textures that highlight the stone’s organic origins.

Standard-grade stones are perfect for those seeking unique, affordable Ammolite pieces with a raw and natural aesthetic.

A Grade Ammolite Stone

A-grade Ammolite captures the gemstone’s natural charm:

• Colour Range: Dominant red and green tones, with occasional flashes of other hues.
• Brightness: Moderate iridescence with a softer glow.
• Clarity: Some surface textures or inclusions that add character.

Perfect for casual collectors or everyday wear, A-grade Ammolite is an authentic piece of Earth’s history.

AA Grade Ammolite Stones

AA-grade stones exhibit brilliance with a slightly narrower colour range:

• Colour Range: Typically features three to four vivid hues, such as fiery reds, radiant greens, and golden yellows.
• Brightness: High luminosity that draws the eye.
• Clarity: Minimal inclusions, preserving the stone’s polished appearance.

This grade balances luxury and accessibility, making it a favourite among fine jewellery buyers.

AAA Grade Ammolite Stones 

Stones graded AAA are the finest examples of Ammolite’s splendour:

• Colour Range: A full spectrum of vibrant hues, including rare and highly prized blues and purples.
• Brightness: Exceptional iridescence that glows like a mirror under light.
• Clarity: Virtually flawless with no visible inclusions.

AAA-grade Ammolite is as rare as it is breathtaking, often sought for investment pieces or show-stopping jewelry.

To inquire about a AAA Grade Stone, please contact.

The Colours of Ammolite: A Kaleidoscope of Nature

Ammolite is renowned for its shifting, iridescent play of colours, which change depending on the angle of light. Its colours are unlike any other gemstone, ranging from fiery reds to elusive blues, each carrying its own significance and rarity.

Red and Orange

The most common tones, symbolizing energy, passion, and vitality. These colours are vibrant and eye-catching, making them popular choices for statement jewellery.

Green

A tranquil and harmonious hue, green represents nature and balance. Stones with predominant green tones are highly sought after for their calming effect.

Blue and Violet

These colours are the rarest and most valued in Ammolite, representing royalty, intuition, and mystery. Only a small fraction of gem-quality Ammolite displays these hues, making them a collector’s dream.

Multi-colour Splendour

The true magic of Ammolite lies in its ability to display multiple colours simultaneously. Stones that feature three or more hues—especially a full spectrum from red to violet—are considered the finest examples and command the highest prices.

Preserving the Legacy of Ammolite

As the world’s leading producer of Ammolite, KORITE is committed to ensuring the gemstone’s legacy endures for generations. Through responsible mining practices and innovative craftsmanship, we celebrate Ammolite’s unparalleled beauty while preserving its natural and cultural heritage.

Whether you’re drawn to the fiery brilliance of red and orange hues, the serene beauty of green, or the rare mystique of blue and violet, Ammolite offers something truly unique. Its rarity, history, and dazzling colours make it a gemstone like no other.

Explore our collections today and own a piece of nature’s extraordinary artistry.