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LOT 2303
Cathedral Geode Half with Amethyst and Calcite Crystals
13 3/4 in. (17.35 kg, 35 cm).
The cathedral lined with large deep purple amethyst crystals, white dog tooth calcite crystals emerging from the left corner; mounted on a custom-made display stand.
ProvenanceFrom Artigas, Uruguay.
Property of a London lady.
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AUCTIONS:
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LOT 2303
Cathedral Geode Half with Amethyst and Calcite Crystals
Estimate £1,800 - 2,400€2,090 - 2,780 (for guidance only)$2,430 - 3,240 (for guidance only)
Opening Bid
£900 (EUR 1,044; USD 1,215) +BP*
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![Group of Fifteen [15] Cut and Polished Agate Geode Slices and Halves](https://timelineauctions.com/upload/images/items/small/256013-s.jpg)
Group of Fifteen [15] Cut and Polished Agate Geode Slices and Halves
Estimate: £30 - 40 (+bp*)
Opening Bid: £5
Comprising five translucent, polished slices and ten cut and polished geode sections. 1.68 kg total, 5.3-14.2 cm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Very Large Cut and Polished 'Septarian Egg' Nodule Half
Estimate: £60 - 80 (+bp*)
Opening Bid: £5
The attractive internal structure filled with yellow calcite, brown aragonite, and grey limestone. 2.78 kg, 19.7 cm
Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Fossil Knightia Fish Plate
Eocene Period, circa 58-36 million years B.P.Estimate: £40 - 60 (+bp*)
Bids: 1 | Current Bid: £5
Showing two Knightia alta fish on a rectangular limestone matrix with a partial third fish. 1.14 kg total, 20.5 x 14.5 cm
From Wyoming, USA. From the private collection of a Devon, UK, lady.
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 Uinta, 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.
