This lot is offered by Christie Manson & Woods Ltd
Christie Manson & Woods Ltd
8 King Street, St. James's, London, SW1Y 6QT, United Kingdom
Phone: +44 (0)20 7839 9060
Fax: +44 (0)20 7839 2869
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Descriptif du lot
The opal like iridescence of these ammonites from Alberta, Canada has been termed ammolite and since 1981 has had the status of a gemstone. 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. The opalescent layers of colour are particularly prized in the Chinese philosophical system of Feng-Shui.
The ammonites are a group of molluscs that lived in the seas from the mid-Devonian (approximately 400 million years ago) to the end of the Cretaceous (65 million years ago). The sequence of events that famously killed off the dinosaurs also drove the ammonites to extinction
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Sculpted by Nature: Fossils, Minerals and Meteorites
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Condition report
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The condition of lots can vary widely and the nature of the lots sold means that they are unlikely to be in a perfect condition. Lots are sold in the condition they are in at the time of sale.
In good conditio, having been restored recently following damage in transit. The fossil is now stable with minor losses previous to restoration filled in with composite specimens, and later losses filled in facsimilme.
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