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LOT 1844
Natural History - Amethyst Crystal Section
3 3/8 in. (677 grams, 85 mm).
A section of amethyst geode displaying some large purple crystals. [No Reserve]
ProvenanceFrom Brazil.
Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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Natural History - Polished Cut Malachite Slab Group
Sold for (Inc. bp): £20
A group of eight polished malachite 'slabs'. 1.04 kg total, 10.5-12 cm
D R of Congo. 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): £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 - Mastodon Tusk Carving
Pliocene Period, 5.2-2.5 million years B.P.Sold for (Inc. bp): £59
A Mastodon fossil tusk carving depicting a stylised face with emphasised detailing. 89 grams, 91 mm
From the Island of Java, Indonesia. Acquired 1950s-1960s. From an old Bristol, UK, paleontological collection.
