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LOT 2399
Large Amethyst and Quartz Crystal Display
CIRCA 120-140 MILLION YEARS B.P.
14 3/4 x 9 3/4 x 6 5/8 in, 20 1/2 in. (14.75 kg, 37.5 x 25 x 17 cm, 52 cm including stand).
An ovoid geode section with large prismatic quartz and light purple amethyst crystals with colour concentrations at the peak of the terminations; 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 2399
Large Amethyst and Quartz Crystal Display
Estimate £2,000 - 3,000€2,320 - 3,480 (for guidance only)$2,700 - 4,050 (for guidance only)
Opening Bid
£11,100 (EUR 12,876; USD 14,985) +BP*
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Druzy Quartz Crystal Geode Display
Circa 140-120 million years B.P.Estimate: £1,000 - 1,400 (+bp*)
Opening Bid: £550
Cut section of geode lined with dark grey to almost black druzy quartz crystals, creating a shimmering effect; two cut stalagmites with polished upper face showing attractive dark banding; mounted on a custom-made display stand. 4.13 kg, 26 x 22 x 10 cm, 32 cm including stand
From Artigas, Uruguay. Property of a London lady. -
Stromatolite Specimen
Estimate: £20 - 30 (+bp*)
Bids: 1 | Current Bid: £5
Comprising two intergrown egg-shaped mounds, produced by the activity of ancient cyanobacteria, the sediment layers visible on the underside. 853 grams, 11.9 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. -
Fossil Tylosaurus Marine Dinosaur Vertebra
Late Cretaceous Period, circa 92-66 million years B.P.Estimate: £30 - 40 (+bp*)
Bids: 2 | Current Bid: £5
The main body of a vertebra with two raised ridges underneath, likely a pygal or caudal vertebra; old inked collector's number 'VR26'. 622 grams, 96 mm
From near Harlan County Dam, Nebraska, USA. 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.
Tylosaurus was an apex marine predator during the Late Cretaceous period, and is classified in the superfamily Mosasauroidea.
