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LOT 1835
Natural History - Large Pink Cut and Polished Agate Crystal Slice
9 1/4 in. (484 grams, 23.5 cm).
A large pink agate crystal slice, polished on both faces; colour-enhanced. [No Reserve]
ProvenanceFrom Antigas, Uraguay.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1835
Natural History - Large Pink Cut and Polished Agate Crystal Slice
Sold for (Inc. bp): £59
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Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £33
A Knightia alta fossil fish in matrix. 678 grams, 18 cm wide
From Wyoming, Green River Formation, U.S.A. Acquired during the 1980s. From the Pradi Collection, Boston, U.S.A.
Seasonally, some 56 million years ago, in the Green River Region of Wyoming, torrential rains fell on the mountains. The rain flowed down the mountain sides, forming wide shallow lakes in the valley below. During the dry season, these lakes evaporated (similar to certain parts of Africa today). Millions of fish died in this short period of time. This climatic cycle happened over a 20-thousand-year period. Layer upon layer of mud was deposited over these years, entombing huge numbers of fish. At a much later date volcanic activity uplifted this area to expose their fossils. -
Natural History - Insects in Baltic Amber Group
Oligocene Period, circa 45 million years B.P.Sold for (Inc. bp): £78
A group of five Baltic amber pieces, each containing flies together with other inclusions. 2.42 grams total, 9-21 mm
Collected between 1930 and 1960. From the collection of the palaeontologist R Gledhill. -
Natural History - Fossil Bird Bone Group
Pleistocene Period, circa 2 million years B.P.Sold for (Inc. bp): £13
A group of five fossil bird bones. 25 grams total, 26-39 mm
From Rancho La Brea Formation, Maricopa Co., California, U.S.A. Acquired in the 1980s. From an old Bristol, UK, paleontological collection.
