CANADA

細節

A Large Ammonite
Canada
From the upper Cretaceous, Bearpaw formation (75-72 Mya), the 20 in. specimen of Placenticeras costatum showing strong iridescence of blue, purple, orange, red, yellow and green, mounted for wall fitting
40½ x 48 in. (108 x 122 cm.)

注意事項

These lots have been imported from outside the EU for sale using a Temporary Import regime. Import VAT is payable (at 5%) on the Hammer price. VAT is also payable (at 20%) on the buyer’s Premium on a VAT inclusive basis. When a buyer of such a lot has registered an EU address but wishes to export the lot or complete the import into another EU country, he must advise Christie's immediately after the auction. All sold and unsold lots marked with a filled square in the catalogue that are not cleared from Christie’s by 5:00 pm on the day of the sale, and all sold and unsold lots not cleared from Christie’s by 5:00 pm on the fifth Friday following the sale, will be removed to the warehouse of ‘Cadogan Tate’. Please note that there will be no charge to purchasers who collect their lots within two weeks of this sale.

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拍品專文

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 Mya). The sequence of events that famously killed off the dinosaurs also drove the ammonites to extinction

CANADA

拍品專文

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