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LOT 2611
Polished Fossil Goniatite Bookends
DEVONIAN PERIOD, CIRCA 400 MILLION YEARS B.P.
6 1/4 in. (3.47 kg total, 16 cm each).
Comprising two quadrilateral bookend carved from fossiliferous stone, each set with a large Goniatite sp. specimen on a textured background. [2, No Reserve]
ProvenanceFrom Atlas Mountains, Morocco, North Africa.
From a Cambridgeshire, UK, collection.
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AUCTIONS:
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Brown and Black Obsidian Mineral Specimen Group [100]
Sold for (Inc. bp): £7
Comprising large irregular chunks. 1.18 kg total, 34-43 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Mixed Polished Agate Bead Necklace
Sold for (Inc. bp): £26
Composed of graduated oval disc beads with loops to each end. 101 grams, 71 cm
Property of a Stockport, UK, collector. -
Large Rainbow-coloured Carborundum Crystal Display Specimen
Sold for (Inc. bp): £33
A large cluster of silicon carbide showing beautiful iridescence. 1 kg, 16 cm
From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.
Carborundum rarely occurs in nature, but is commercially formed by heating carbon and silicon at very high temperatures, producing extremely strong bands of crystals.