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LOT 2248
Natural History - Historic Cronstedtite Mineral Specimen
2 in. (41 grams, 57 mm including box).
Comprising a heterogenic mass of dark brown crystals with white quartz; supplied in a display box. [No Reserve]
ProvenanceCollected in person from various parts of the world mainly between 1957-1966.
From the private mineral collection of Stephen Atkinson, Harpenden, UK.
Accompanied by a copy of a letter from the vendor giving details of him collecting these minerals throughout his life.
Cronstedtite is an uncommon mineral that occurs as a hydrothermal product in ore veins.
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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Natural History - Knightia Fossil Fish Group
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £52
Comprising three rounded sandstone matrices, each with a Knightia alta specimen. 159 grams total, 75 mm each
From a Lincolnshire, UK, collection.
In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish. The Green River system was composed of three lakes: Lake Ulinta, Lake Gosiute and Fossil Lake. These Eocene lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time. The climate was much different from the desert-like climate of this area today. Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today. Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time. -
Natural History - Boxed Historic Quartz on Calcite Crystal Specimen
Sold for (Inc. bp): £7
Mainly comprising white small crystals on light yellow calcite matrix. 173 grams, 58 mm
Ex Gregory, Bottley & Lloyd (Gregory's). -
![Natural History - Very Large Amethyst Crystal Point Group [6]](https://timelineauctions.com/upload/images/items/small/207966-s.jpg)
Natural History - Very Large Amethyst Crystal Point Group [6]
Sold for (Inc. bp): £20
Comprising six large points, three with twinned crystal formation. 1.89 kg total, 64-85 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).
