The Rainbow Gem Made from Ancient Sea Creatures

Ammonites were ancient cephalopods with spiral shells, now extinct but found as fossils worldwide. In southern Alberta, Canada, some ammonite fossils have transformed into colorful gems called amolite. This transformation is due to unique geological conditions that preserved the aragonite mineral in the shells, preventing it from converting to calcite. The Bear Paw Formation, rich in iron and magnesium, may have played a role in this preservation. Amolite's vibrant colors result from light diffraction through aragonite crystals, creating a rainbow effect. Scientists continue to study these processes to understand how these beautiful gems formed.

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