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LOT 1788
Natural History - Historic Sphalerite Crystal Formation
2 3/4 in. (148 grams, 70 mm).
Comprising black euhedral crystals on a contrasting matrix. [No Reserve]
ProvenanceFrom Nenthead, Cumberland, UK.
Collected in person from various parts of the world mainly between 1957-1966.
From the private mineral collection of Stephen Atkinson, Harpenden, UK.
Accompanied by a copy of a letter from the vendor giving details of him collecting these minerals throughout his life.
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AUCTIONS:
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LOT 1788
Natural History - Historic Sphalerite Crystal Formation
Sold for (Inc. bp): £7
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Natural History - Boxed Pyrite Crystal 'Paper Weight'
Sold for (Inc. bp): £13
With a cluster of larger crystals atop smaller crystal formations; in a labelled specimen tray. 182 grams, 53 mm
From Huanuco, Peru. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Boxed Historic Sphalerite with Quartz 'Paper Weight' Crystal Specimen
Sold for (Inc. bp): £46
The bifacial matrix comprising mainly anhedral sphalerite crystals with opaque quartz crystals and some small pyrite crystals; inked collection number 'S13' to one side. 405 grams, 86 mm
Ex Gregory, Bottley & Lloyd (Gregory -
Natural History - Diplomystus Fossil Fish
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £98
On an oval sandstone matrix. 350 grams, 19 cm
From a Lincolnshire, UK, collection.
In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish. The Green River system was composed of three lakes: Lake Ulinta, Lake Gosiute and Fossil Lake. These Eocene lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time. The climate was much different from the desert-like climate of this area today. Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today. Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time.
