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LOT 1946
Natural History - Amethyst Crystal Specimen Group
2 - 2 1/8 in. (602 grams total, 49-55 mm).
A group of nine amethyst crystal specimens held in white card collector's trays, each labelled 'Rio Grande do Sul, Brazil'. [9, No Reserve]
ProvenanceFrom Rio Grande do Sul, Brazil.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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Natural History - Topaz Mineral Specimen Collection
Sold for (Inc. bp): £20
A group of eleven boxed topaz on matrix mineral specimens. 145 grams total, 21-39 mm
Very fine condition.
From Mexico. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Selenite 'Desert Rose' Cluster
Sold for (Inc. bp): £33
A cluster of large selenite 'desert rose' specimens. 586 grams, 14 cm
Ex Cambridgeshire, 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.
