The Rainbow Gemstone

Found only in Southern Alberta, Canada, Ammolite is one of the rarest gemstones on Earth.

Formed from the fossilized shells of ancient ammonites over 70 million years ago, each gemstone displays a completely unique mosaic of natural colour, pattern, and iridescence found nowhere else in the world.

Explore genuine handcrafted Ammolite gemstones, jewelry, and collector specimens.

Natural Ammolite Silver Pendant CGJP15 with green and blue colour, view 2

HANDCRAFTED AMMOLITE

Wearable Art, One of One

Found only in Southern Alberta, every ammolite gemstone is a 70-million-year-old fossil with a colour and pattern that will never exist again. Each piece we create is the only one of its kind.

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Who are we?

Coulee Gems is a small Canadian-owned artisan business based in Lethbridge, Alberta, specializing in the preservation and craftsmanship of ammolite. Through our work, we hope to share both the beauty and deep historical roots of this remarkable gemstone with more people around the world.

OUR CRAFT

From an ancient seabed to your hands

We surface-collect ammonite shells from the Bearpaw Formation, then hand-finish each stone and individually craft its silver setting in our Lethbridge, Alberta studio, one piece at a time.

Our Story

Featured Jewelry

A hand-picked selection of our ammolite jewelry.

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Featured Gemstones

Finished Ammolite gemstones showcasing the natural colours and patterns of one of the world's rarest gemstones. Perfect for collectors, displays, or custom jewelry creations.

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Featured Shells & Specimens

Featuring full and partial ammonite and baculite fossils with vibrant natural coloration and unique shell patterns from the Bearpaw Formation of Southern Alberta. These specimens make incredible display pieces for fossil, mineral, and gemstone collections.

The Art of Ammolite

Curious how ammolite forms or how each piece is made? Explore our blog for an inside scoop into both the science and craft behind every gem.

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Our Guarantee

  • Handcrafted in Alberta

    Every piece is individually processed and set in our workshop located in Lethbridge, Alberta.

  • Ethically Sourced

    Surface-collected and processed in accordance with Alberta regulations.

  • 100% Genuine Ammolite

    Every piece is authentic, untreated ammolite from Southern Alberta - never dyed or imitation.