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LOT 2032
Natural History - Cut and Polished Malachite Mineral Specimen Group
1 - 1 3/4 in. (195 grams total, 24-46 mm).
A group of ten cut malachite mineral specimens, each with two polished faces. [10, No Reserve]
ProvenanceFrom D.R.Congo.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 2032
Natural History - Cut and Polished Malachite Mineral Specimen Group
Sold for (Inc. bp): £33
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Natural History - Fossil Brittle Star Group
Ordovician Period, 485-444 million years B.P.Sold for (Inc. bp): £33
A group of three brittle stars Ophiuroidea sp. on a matrix. 307 grams total, 68-90 mm
From El Kaid Errami, Tafilalt, Morocco, North Africa. From an old German collection. -
Natural History - Cut and Polished Malawi Agate Geode Pair
Sold for (Inc. bp): £13
An attractive pair of Malawi agate geode cult halves, with polished faces. 1.1 kg total, 11.5 cm each
Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
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.
