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LOT 2470
Agate and Amethyst 'Window' Display
CRETACEOUS PERIOD, CIRCA 140-120 MILLION YEARS B.P.
9 5/8 x 6 1/4 x 4 1/4, 14 in. (3.15 kg, 24.5 x 16 x 11 cm, 35.5 cm including stand).
Polished geode section with six rounded openings creating windows to the inside of the geode, the internal walls lined with vibrant purple amethyst crystals; mounted on a custom-made display stand.
ProvenanceFrom Artigas, Uruguay.
Property of a London lady.
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AUCTIONS:
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LOT 2470
Agate and Amethyst 'Window' Display
Estimate £1,800 - 2,400€2,090 - 2,780 (for guidance only)$2,430 - 3,240 (for guidance only)
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Polished Fossil Goniatite Specimen Collection
Devonian Period, circa 417-354 million years B.P.Estimate: £20 - 30 (+bp*)
Opening Bid: £5
Comprising three polished specimens showing the internal structure. 360 grams total, 60-91 mm
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. -
3.95 Carat Rough Natural Sapphire Crystal
Estimate: £50 - 70 (+bp*)
Bids: 1 | Current Bid: £5
Opaque dark blue crystal showing lamellar twinning. 0.79 grams, 9 mm
Property of an Essex, UK, gentleman. -
The Tooth of a North American Tyrannosaurus-Rex from Montana
Maastrichtian, Upper Cretaceous, circa 67-66 million years B.P.Estimate: £4,000 - 6,000 (+bp*)
Bids: 1 | Current Bid: £2,000
A well-preserved large tooth with knife-like serrations on two edges, designed to slice through flesh and bone, displaying beautiful dark brown patina. 53 grams total, tooth: 54 mm, 12.5 cm including stand
Found in the Hells Creek Formation, Montana, USA. Property of a Bristol, UK, gentleman collector.
The most famous and iconic of all dinosaur species, the Tyrannosaurus rex, was first described by Henry Fairfield Osborn in 1905 from a skeleton found in 1902, from the Hell Creek Formation in Montana. An adult Tyrannosaurus would have weighed almost nine tonnes, standing over 4 meters tall at the hip and exceeding 13 meters in length. It is no wonder this theropod was the top predator of the Late Cretaceous, and amongst the last dinosaurs to walk the Earth before their mass extinction. The present tooth offers an incredible insight into how these ferocious creatures lived, characterised by its unique curved and serrated shape, which was specifically adapted to help the dinosaur tear through hides and flesh, with the curvature allowing maximum force to be applied as it tore into its prey.
