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LOT 1821
Natural History - British Fossil Fern Group
CARBONIFEROUS PERIOD, CIRCA 310 MILLION YEARS B.P.
3 - 3 3/8 in. (281 grams total, 76-87 mm).
A group of three fern specimens including Alethopteris sp. and Sphenopteris laurenti. [3, No Reserve]
ProvenanceFrom the Middle Coal Measures, Clay Cross, Derbyshire, England.
From an old Oxfordshire, UK, fossil and mineral collection.
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AUCTIONS:
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LOT 1821
Natural History - British Fossil Fern Group
Sold for (Inc. bp): £33
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Natural History - Australian Agate Creek Cut and Polished 'Thunder Egg' Pair
Sold for (Inc. bp): £34
Two halves of a cut Australian 'thunder egg', with both exposed faces polished. 455 grams total, 82 mm each
Agate Creek, Australia. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - Yellow-Brown Calcite Group
Sold for (Inc. bp): £7
A group of 50 yellow-brown calcite specimens with waxy lustre. 540 grams total, 25-47 mm
From Mexico. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). -
Natural History - 'Spartan Basalt' Polished Green Porphyry Section
Sold for (Inc. bp): £286
A large cut section of green porphyry mined in Greece, possibly in ancient Roman times. 1.22 kg, 18.1 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.
