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LOT 1870
Natural History - Unpolished Thick Cut Amethyst Crystal Slab
9 7/8 in. (1.9 kg, 25 cm).
An unpolished, cut banded amethyst crystal slab; '52' inked to one face. [No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1870
Natural History - Unpolished Thick Cut Amethyst Crystal Slab
Sold for (Inc. bp): £26
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Natural History - Large Mocha Dendritic Agate Mineral 'Plant Picture' Stone
Sold for (Inc. bp): £20
A rectangular limestone matrix exhibiting finely formed dendrites of manganese oxide. 1.39 grams, 23.5 cm
Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Mammoth Tusk Section Group
Pleistocene Period, circa 40,000 years B.P.Sold for (Inc. bp): £46
A pair of Mammoth primigenius tusk sections displaying mainly gold and brown colouring, with some attractive patterning. 131 grams total, 20-26.5 cm
From the North Sea. From an old Bristol, UK, collection. -
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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.
