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LOT 1812
Natural History - Citrine and Amethyst Gem Tree
6 1/4 in. (623 grams, 16 cm high).
A medium size gemstone tree comprising a brass trunk and branches tipped with polished citrine pebbles, mounted on a section of amethyst geode. [No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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Natural History - North American T-Rex Dinosaur Coprolite
Cretaceous Period, 145-65 million years B.P.Sold for (Inc. bp): £26
A coprolite (fossilised dung) section from a North American tyrannosaurid dinosaur, possibly the famous T-Rex; held in a white card collector's tray. 286 grams, 89 mm
From USA. Ex Lincolnshire, UK, collection. -
Natural History - Labradorite Crystal Specimen Group
Sold for (Inc. bp): £1
A group of 20 crystalline labradorite specimens of dark colour, with a waxy lustre; a calcium-enriched feldspar mineral first identified in Labrador, Canada, which can display an iridescent effect. 2.79 kg total, 4.6-10.6 cm
Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Knightia Fossil Fish in Matrix
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £65
A rectangular sedimentary matrix displaying at least four fossil Knightia sp. fish. 624 grams, 16 cm
Ex 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.
