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Cabinet of Curiosities: Natural History, Entomology and Minerals / Exceptionnelle ammonite opalescente Exceptional Opalescent Ammonite

Lot 41
Exceptionnelle ammonite opalescente

Exceptional Opalescent Ammonite
21 September 2022, 14:00 CEST

Sold for €8,287.50 inc. premium

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Exceptionnelle ammonite opalescente

Exceptional Opalescent Ammonite

Placenticeras meeki
Upper Cretaceous
Pierre Shale, South Dakota, USA

Long a key part of a major private collection, this beautiful Placenticeras meeki ammonite from the famed Pierre Shale formation of South Dakota, displays the incredible opalescent "fire" that is so desired by fossil enthusiasts. Mineralization drawn from elements such as copper and iron-- and enhanced by 70 million years of sub-strata pressure-- has caused the rainbow of red and green colors to emerge. But in addition to its natural beauty, this incredible fossil also tells a story... a remnant of a sea creature alive during the height of the dinosaur's reign. The iridescence arises during the fossilization of the nacre of the shell of the once-living creature. The intact nacre of this ammonite is smooth and exhibits exceptional color and preservation and the inflation of the shell is full. Measuring 19 x 15 x 5 cm

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