The Rainbow Gemstone

Ammolite is an exceptionally rare gemstone formed from the fossilized shells of Placenticeras, ancient marine creatures that lived over 70 million years ago alongside the dinosaurs. Found only within the Bearpaw Formation of Southern Alberta, Canada, its brilliant opal-like play of color is the result of unique geological conditions found nowhere else on Earth.

No two pieces are ever alike. Each shell displays its own natural mosaic of colors, patterns, and character, making every gemstone completely unique and truly one of a 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.

Featured Gemstones

Our collection of ammolite gemstones features vibrant natural colors and unique patterns, making them perfect as display pieces or ready for setting into bezels, wire wraps, and custom jewelry designs.

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Featured Jewelry

Handcrafted silver ammolite jewelry featuring vibrant natural gemstones set in sterling silver. Each piece is individually made to complement the unique colors, patterns, and character of the stone

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Featured Shells and Specimen

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.

  • Shell 3

    Shell 3

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    Shell 3

    $0.00 CAD
    $0.00 CAD
    Sold out