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LOT 2597
Natural History - Historic Pyrite on Calcite and Fluorite Mineral Specimen
3 1/4 in. (205 grams, 85 mm).
Consisting of a cluster of cubic pyrite crystals on a matrix of white calcite and fluorite crystals, with a very small quantity of unidentified sky-blue material, collection number 609. [No Reserve]
ProvenanceAcquired on the UK mineral and fossil market, since 1970.
From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent.
Accompanied by an original historic index file card.
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AUCTIONS:
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LOT 2597
Natural History - Historic Pyrite on Calcite and Fluorite Mineral Specimen
Sold for (Inc. bp): £20
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Natural History - Historic 'Chokotka Peninsula, U.S.S.R.' Demantoid Mineral Specimen
Sold for (Inc. bp): £52
With apple-green and greenish white crystals, the calcium has been replaced by traces of chromic acid, collection number 461. 75 grams, 87 mm
Acquired on the UK mineral and fossil market, since 1970. From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent. Accompanied by an original historic index file card and an old Gregory, Bottley & Lloyd label. -
![Natural History - Mixed Polished Mineral Specimen Pebble Group [100]](https://timelineauctions.com/upload/images/items/small/211396-s.jpg)
Natural History - Mixed Polished Mineral Specimen Pebble Group [100]
Sold for (Inc. bp): £13
Comprising: haematite, quartz, amethyst, aventurine, dalmatian jasper and others. 722 grams total, 15-33 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
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Natural History - Knightia Fossil Fish
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £33
Knightia alta specimen on a rectangular matrix. 397 grams, 13.3 cm
From Wyoming (Green River Formation), USA. 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.
