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.
Post Lot Text
This lot has been imported from outside the EU for sale and placed under the Temporary Admission regime. Import VAT is payable (at 5%) on the hammer price. VAT at 20% will be added to the buyer’s premium but will not be shown separately on the invoice. Please see the Conditions of Sale for further information.
相關文章
Sorry, we are unable to display this content. Please check your connection.
Overall in very good condition, noting the ammonite has been treated with a transparent resin to stabilise and enhance the glossy finish. The matrix seemingly treated to stabilise, the finish a matte charcoal grey, wooden mounting board with metal rails affixed to reverse for hanging.
預計金額計算機
拍品 104拍賣 18819
CANADAA LARGE IRIDESCENT AMMONITE估價: GBP 25,000 - 35,000