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LOT 1767
Natural History - Cut and Polished Agate Crystal Geode Slice Group
3 3/8 - 4 in. (836 grams total, 8.6-10.1 cm).
A group of 15 agate geode slices of various sizes and displaying various colours, polished to both faces. [15, No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1767
Natural History - Cut and Polished Agate Crystal Geode Slice Group
Sold for (Inc. bp): £39
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Natural History - 54 Carat Ruby Crystal Group
Sold for (Inc. bp): £57
A group of four natural ruby crystal fragments, one with cortex. 10.8 grams total, 16-23 mm
Fine condition.
Ex UK art market, 1970s. Property of a London gentleman. -
Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £39
A Knightia alta fossil fish in matrix. 277 grams, 13 x 9.5 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 - Crystal Geode Nodule
Sold for (Inc. bp): £42
Two halves of a crystal geode, exposing colour-enhanced crystals to the inner surfaces. 2.57 kg total, 14.5 -15.2 cm
Ex Cambridgeshire, UK, collection.
