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LOT 2315
Group of Three [3] Large Cut and Polished Agate Geode Specimens
3 7/8 - 4 3/4 in. (2.06 kg total, 9.7-12.2 cm).
Comprising three freestanding sections with polished faces showing mainly grey and brown banding, and each with a central crystal-lined cavity. [3, No Reserve]
ProvenanceFrom Brazil.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
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AUCTIONS:
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LOT 2315
Group of Three [3] Large Cut and Polished Agate Geode Specimens
Sold for (Inc. bp): £13
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Morton Gneiss Plate Sections
Circa 3.5 billion years B.P.Sold for (Inc. bp): £156
Comprising three rectangular sections of grey pink and black medium to coarse-grained biotite-quartz-plagioclase gneiss with polished upper face, each with wooden backing and one cracked. approx. 84 kg total, 85 x 58 cm each
Canadian Shield, Minnesota River Valley, Southwestern Minnesota, USA. with Phillips, New York, 3 June 1995, no.81. Private collection, Florida, acquired at the above sale. with Sotheby’s, New York, 28 April 2021, no.27 (est. $2,500–3,500).
The world’s oldest known rocks come from the Canadian Shield area of North America. Among the most ancient is the present material, Morton Gneiss at approximately 3.5 billion years old believed to be part of Earth’s first planetary crust. The swirls and layers are a result of metamorphism that incurred when the original volcanic rock was buried to tremendous depths. -
Polished Orthoceras Fossil Coaster Set
Devonian Period, circa 400 million years B.P.Sold for (Inc. bp): £91
Comprising a set of six round coasters and a holder, carved from fossiliferous stone. 700 grams total, 91 mm
Ex Cambridgeshire, UK, collection. -
Fossil Phacops Trilobite on Matrix
Devonian Period, circa 444-439 million years B.P.Sold for (Inc. bp): £78
Comprising two aquatic arthropod showing good detail in the carapace, resting on an irregular matrix. 128 grams, 74 mm
From Lebanon. From a Cambridgeshire, UK, collection.