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LOT 2687
Cut and Polished Agate Slice Collection [6]
4 1/4 - 4 3/4 in. (633 grams total, 11-12 cm).
Comprising four translucent slices displaying brown and grey banding, and two blue dyed slices with crystal linings. [6, No Reserve]
ProvenanceFrom Brazil.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
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AUCTIONS:
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Natural Ruby in Zoisite Mineral Specimen Group [50]
Sold for (Inc. bp): £7
Comprising fifty irregular, unpolished specimens. 958 grams total, 15-34 mm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Lapis Lazuli and Hardstone Bead Necklace String
Sold for (Inc. bp): £20
Restrung group of tubular, tabular and other types with oblate pendant centrepiece. 39 grams, 41 cm
London, UK, collection, 2000s. -
Knightia Fossil Fish in Matrix Group
Eocene Period, circa 58-36 million years B.P.Sold for (Inc. bp): £65
Comprising three rounded matrices, each with a Knightia alta specimen. 145 grams total, 63-74 mm
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.