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LOT 1759
Natural History - Very Large Septarian Cut and Polished 'Alien Egg' Geode Half
8 in. (3.8 kg, 20.5 cm).
A cut and polished septarian egg half, the centre filled with calcite crystals surrounded by a thin layer of aragonite, the outer layer of grey limestone; a beautiful display piece. [No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1759
Natural History - Very Large Septarian Cut and Polished 'Alien Egg' Geode Half
Sold for (Inc. bp): £52
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Natural History - Polished Amber with Insect Inclusion
Oligocene Period, circa 45 million years B.P.Sold for (Inc. bp): £59
A polished specimen of amber displaying insect inclusions; Primorskoje mine, Kaliningrad. 6.83 grams, 27 mm
From the Baltic Sea Coast, Primorskoje mine, Kaliningrad. From an Essex, UK, collection. Accompanied by an illustrated identification card with collection number 3199. -
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Natural History - Fossil Diplomystus Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £46
A fossil Diplomystus sp. fish in a matrix. 500 grams, 16.5 x 11.7 cm
From the Green River Formation, Lincoln County, Wyoming, U.S.A. From an old Lincoln, UK, collection.
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 - Polished Agate Mineral Specimen
Sold for (Inc. bp): £5
A cut and polished natural coloured agate geode section. 429 grams, 12 cm
From Salto do Jucui, Rio Grande do Sul, Brazil. Private collection, Munster, Germany.
