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LOT 1831
Natural History - Box of Iceland Spar Mineral Specimens
1 3/8 - 1 7/8 in. (2.57 kg total, 35-48 mm).
A group of over 40 Iceland Spar mineral specimens; held in a cardboard box. [48, No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1831
Natural History - Box of Iceland Spar Mineral Specimens
Sold for (Inc. bp): £169
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Natural History - Fossil Coral Head
Cenozoic Period, circa 56-52 million years B.P.Sold for (Inc. bp): £39
A reconstructed colony of fossil Trochocyathus sp. corals; in a display box. 365 grams total, 12 x 9 cm including case
Ex Lincolnshire, UK, collection. -
Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £52
A pair of Knightia alta fossil fish in a matrix. 336 grams, 12.6 x 11 cm
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. -
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Natural History - Emerald in Biotite Mica Specimen
Sold for (Inc. bp): £65
A substantial specimen of green emerald crystals in biotite mica matrix; supplied in a cardboard specimen tray. 680 grams, 15 cm
Very fine condition.
Mineral Imports, London, UK. Ex Gregory, Bottley & Lloyd (Gregory's).
