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LOT 2528
Fossil Astrotheca and Neuropteris Ferns in Split Nodules
CARBONIFEROUS PERIOD, CIRCA 358-298 MILLION YEARS B.P.
4 - 4 1/8 in. (366 grams total, 10-10.7 cm).
Comprising two opened nodules showing the positive and negative of the fern fossil. [2, No Reserve]
ProvenanceFrom Pennsylvanian Mazon Creek, Braidwood, Illinois, 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.
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AUCTIONS:
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LOT 2528
Fossil Astrotheca and Neuropteris Ferns in Split Nodules
Sold for (Inc. bp): £143
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Large Amethyst and Quartz Crystal Display
Circa 120-140 million years B.P.Estimate: £2,000 - 3,000 (+bp*)
Opening Bid: £1,100
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. 14.75 kg, 37.5 x 25 x 17 cm, 52 cm including stand
From Artigas, Uruguay. Property of a London lady. -
Large Deep Purple Amethyst Cathedral Display
Circa 140-120 million years B.P.Sold for (Inc. bp): £2,470
A complete half of a pyramidal geode, showing deep purple amethyst crystals with tan-coloured druzy quartz; mounted on a custom-made display stand. 38.6 kg, 84 x 38 x 17 cm, 112 cm including stand
From Artigas, Uruguay. Property of a London lady. -
Group of Twenty-Seven [27] Cut and Polished Agate Geode Specimens
Sold for (Inc. bp): £20
Boxed group of agate geode halves, most showing attractive banding and crystal-lined interiors, one an unopened geode with a polished face. 2.48 kg total, 2.8-10.8 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.