Ammonite Polished Fossil Half Inlaid with Gem Quality Ammolite

What You Are Receiving

A single, museum-quality polished ammonite fossil half inlaid with gem-quality ammolite — one of the rarest organic gemstones on Earth. One face reveals the intricate spiral septate chamber structure of the fossilized cephalopod; the opposing face blazes with the iridescent play-of-color that defines fine ammolite. No two pieces share the same color spectrum or chamber pattern.

• Dimensions: 7.5"H × 9"W × 2"D
• Weight: 1,760g (3.88 lbs)
• Finish: High-polish lapidary cut on ammolite face; natural fossil texture on reverse
• Color range: Deep greens and blues to warm golds and reds, depending on viewing angle

Geological Origin & Formation

Ammonites were free-swimming cephalopod mollusks that dominated the world’s oceans from the Devonian through the end of the Cretaceous period (~66 million years ago). The specimens used for gem-quality ammolite originate almost exclusively from the Bearpaw Formation of southern Alberta, Canada — a shallow inland sea deposit where exceptional preservation conditions allowed the original aragonite nacre of the shell to survive fossilization with its iridescent microstructure intact. The result is ammolite: an opal-like gemstone composed of thin-film aragonite layers that produce spectral color through light interference.

• Age: Approximately 70–75 million years (Late Cretaceous)
• Mineral composition: Aragonite (CaCO³) with trace silica, pyrite, and calcite
• Optical phenomenon: Thin-film interference (similar to labradorite and opal)
• Primary source: Bearpaw Formation, Alberta & Montana
• Hardness: 3.5–4.5 Mohs (ammolite face); matrix varies

Historical & Cultural Significance

The Blackfoot Confederacy (Siksika, Kainai, Piikani nations) of the northern Great Plains have revered ammolite for centuries, calling it Iniskim — the Buffalo Stone — and using it as a sacred talisman believed to attract buffalo herds and bring prosperity. Ammonites appear in the fossil records of nearly every ancient civilization: Roman naturalists called them cornu Ammonis (horn of Ammon) after the ram-horned Egyptian deity; medieval Europeans called them “snakestones” and attributed them with healing and protective powers. Ammolite was officially recognized as a gemstone by the World Jewellery Confederation (CIBJO) in 1981.

Metaphysical & Energetic Properties

• Ammonite fossil: Associated with the Fibonacci spiral and sacred geometry; considered a stone of evolution, continuity, and grounding life-force energy through deep time
• Ammolite: Linked to all seven chakras due to its full spectral color range; traditionally used to amplify chi, stimulate creativity, and attract abundance
• Combined energy: Regarded as a complete energetic system — the ancient fossil structure anchoring the luminous, activating energy of the gem surface

Care

• Cleaning: Wipe with a soft, dry cloth; avoid water immersion and chemical cleaners on the ammolite face
• Handling: Ammolite is relatively soft — avoid contact with harder minerals and abrasive surfaces
• Display: Keep out of prolonged direct sunlight to preserve ammolite color vibrancy; ideal for a display stand or collector cabinet
• Storage: Wrap in soft cloth or microfiber if storing; do not stack with harder specimens