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_900x900.jpg "Natural History - Mimetite and Calcite Crystal Specimen")
_200x200.jpg "Natural History - Mimetite and Calcite Crystal Specimen")
.jpg "Natural History - Mimetite and Calcite Crystal Specimen")
LOT 1873
Natural History - Mimetite and Calcite Crystal Specimen
2 3/4 in. (150 grams, 71 mm).
A sphalerite matrix with small clusters of yellow mimetite crystals and large white hexagonal calcite crystals; supplied in a cardboard specimen tray. [No Reserve]
ProvenanceMineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
TimeLine 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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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 - Fossil Dolphin Vertebra Group
Miocene Period, circa 15 million years B.P.Sold for (Inc. bp): £13
A group of three fossilised Delphinus sp. dolphin vertebrae. 302 grams total, 72-91 mm
From North Carolina, U.S.A. Acquired 1950s-1960s. From an old Bristol, UK, paleontological collection. -
Natural History - Fossil Agadir Ammonite
Cretaceous Period, 145-66 million years B.P.Sold for (Inc. bp): £52
A free-standing Mellitella sp. fossil ammonite. 1.8 kg, 13.5 cm
From Agadir, Morocco, North Africa. Ex Cambridgeshire, UK, collection.
