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LOT 1811
Natural History - Pyrite Crystal Specimen Group
1 1/2 - 3 1/8 in. (1.26 kg total, 40-81 mm).
A group of ten iron pyrites, or 'fool's gold', nuggets displaying crystals of various sizes. [10, No Reserve]
ProvenanceFrom Peru.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1811
Natural History - Pyrite Crystal Specimen Group
Sold for (Inc. bp): £13
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Natural History - Blue Calcite Mineral Specimens
Sold for (Inc. bp): £33
A group of 50 blue calcite mineral specimens with waxy lustre. 514 grams total, 25-43 mm
From Mexico. 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. -
Natural History - Fluorite Triangle Collection
Sold for (Inc. bp): £20
A group of 25 natural purple and lavender fluorite triangular cleavages. 400 grams total, 26-41 mm
Fine condition.
From China. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).
