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LOT 1975
Natural History - Large Historic Citrine Crystal Specimen
6 1/4 in. (2.69 kg, 16 cm).
A substantial section of a natural geode with richly coloured citrine crystals to the inner face. [No Reserve]
ProvenanceEssex gallery, early 2000s.
CONDITIONTimeLine Auctions follows a vetting process to ensure the authenticity and legality of all items, reinforcing our commitment to integrity and responsible trading. Each antiquity, antique, and coin lot undergoes thorough examination by a vetting committee of at least ten external specialists, professional trade association members, scientists, and archaeologists: Our Vetting Process
AUCTIONS:
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LOT 1975
Natural History - Large Historic Citrine Crystal Specimen
Sold for (Inc. bp): £33
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Natural History - British Heteromorph Fossil Ammonite with Bivalves Display
Jurassic Period, circa 180 million years B.P.Sold for (Inc. bp): £78
A heteromorph fossil Spiroceras annulatum ammonite together with Neocrassina miodularis bivalves in an amorphous matrix; collector's hand written label 'Burton Bradstock 1002' to reverse; Inferior Oolite, Garantiana Zone. 972 grams, 16.5 cm
From Burton Bradstock, Dorset, UK. Property of a Leicestershire, UK, private collector. -
Natural History - Cut and Polished Mineral Globe Group
Sold for (Inc. bp): £33
A mixed group of three polished mineral spheres including two of unakite and one agate; held in white card collector's trays. 269 grams total, 33-40 mm
From Brazil. 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.
