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LOT 1691
Natural History - Very Large Australian Amethyst Crystal Specimens
2 7/8 - 3 3/4 in. (1.5 kg total, 74-95 mm).
A trio of very large Australian amethyst crystal specimens in their natural state; in various shades of purple, including one particularly dark example. [3, No Reserve]
ProvenanceFrom Australia.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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LOT 1691
Natural History - Very Large Australian Amethyst Crystal Specimens
Sold for (Inc. bp): £39
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Natural History - Ice Age Bison Fossil Leg Bone
Devensian Period, 110,000-12,000 years B.P.Sold for (Inc. bp): £13
A large Ice Age Bison priscus lower leg bone. 1.23 kg, 43 cm
From Brown Bank, off Lowestoft, UK. Acquired before 1960. From an old Norwich, UK, collection. -
Natural History - Fossil Mosasaur Teeth Group
Cretaceous Period, 67-65 million years B.P.Sold for (Inc. bp): £65
A trio of fossil Mosasaur sp. teeth with remains of root and enamelling, each set in an oval matrix. 1.4 kg total, 13.1-13.8 cm
From Morocco, North Africa. Ex Cambridgeshire, UK, collection. -
Natural History - Knightia Fossil Fish
Eocene Period, 56-33 million years B.P.Sold for (Inc. bp): £33
A Knightia alta fossil fish in matrix. 678 grams, 18 cm wide
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.
