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LOT 2147
Natural History - Medium Amethyst Crystal Geode Section Group [20]
2 1/8 - 3 in. (2 kg total, 54-78 mm).
Comprising variously sized geode sections with clusters of purple amethyst crystals. [20, No Reserve]
ProvenanceFrom Brazil.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 2147
Natural History - Medium Amethyst Crystal Geode Section Group [20]
Sold for (Inc. bp): £13
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Natural History - Natural Australian Opal Specimen
Sold for (Inc. bp): £72
Displaying a good play of colour on milky-white background, tag with handwritten information: 'JOAN'S OPAL / PURCHASED / SYDNEY 1983 / IT IS A V. GOOD / ANDDAMOOKA CRYSTAL'. 0.75 grams, 11.99 mm
Purchased Sydney, Australia, in 1983. From a Norfolk, UK, collection. Property of an East Sussex, UK, gentleman. Accompanied by a pouch and information tag. -
Natural History - Knightia Fossil Fish Group
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £20
Comprising three Knightia alta specimens, each on a rounded matrix. 177 grams total, 80-91 mm
From Wyoming (Green River Formation), USA. 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. -
Natural History - Polished Fossil Ammonite Plate
Jurassic Period, circa 199-145 million years B.P.Sold for (Inc. bp): £156
A composite plate containing a large number of variously sized fossil ammonites, polished upper face. 782 grams, 24.5 cm
From Madagascar. From a Lincolnshire, UK, collection.
