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LOT 2135
Natural History - Amethyst Crystal Geode Section
4 1/2 in. (837 grams, 11.4 cm).
Cut to a roughly triangular shape with large, deep purple crystals. [No Reserve]
ProvenanceFrom Brazil.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's).
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AUCTIONS:
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Natural History - Historic Roman 'Spartan Basalt' Cut & Polished Green Porphyry Section
Sold for (Inc. bp): £442
A large lacquered cut section mined in Greece, probably recycled material mined in ancient Roman times. 574 grams, 23 cm
From Greece. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's).
Also known as Lapis Lacedaemonius and Porfido Verde Antico, a type of green porphyry quarried in Greece. Spartan basalt is a form of andesite or volcanic rock known today only from a single source in the village of Krokees on the Peloponnese in Greece. In addition, ancient sources mention a quarry of Lapis Lacedaemonius in Taygetus. -
Natural History - Mastodon Tusk Carving
Pliocene Period, circa 5.2-2.5 million years B.P.Sold for (Inc. bp): £52
With a later stylised face carving. 53 grams, 87 mm
From Island of Java. From an old Bristol, UK, collection. -
Natural History - Knightia Fossil Fish Plate
Eocene Period, circa 56-33 million years B.P.Sold for (Inc. bp): £85
The square sandstone matrix with two Knightia alta fossil fish specimens. 507 grams, 16 x 13 cm
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.
