Fossilised Ammolite in grey slate

Placenticeras intercalare
Upper Cretaceous (75-72 million years ago)
45 x 52 x 5 cm
Alberta, Canada

SOLD

Known as ‘Ammolite’, the shimmering, metallic colours were caused by the combination of millions of years of compression and the mineralization of iron, copper and silica which precipitated from volcanic ash. It is very rare find a specimen with blues and purples.

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