Large iridescent opal ammonite. L 10.5cm.... - Lot 428 - Vermot et Associés

Lot 428
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Large iridescent opal ammonite. L 10.5cm.... - Lot 428 - Vermot et Associés
Large iridescent opal ammonite. L 10.5cm. 283g. The shimmering iridescence with red dominance, very sought after, is due to the degradation of the aragonite during the fossilization of cephalopods. Mahajanga. Madagascar. Lower Cretaceous, Albian (100 million years).
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