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LOT 2763
Brittlestar Fossil on Matrix
MIDDLE ORDOVICIAN PERIOD, CIRCA 450 MILLION YEARS B.P.
6 7/8 in. (782 grams, 17.5 cm).
Ophiuroidea sp. on an irregular matrix. [No Reserve]
ProvenanceFrom a Cambridgeshire, UK, collection.
CONDITIONTimeLine Auctions follows a vetting process to ensure the authenticity and legality of all items, reinforcing our commitment to integrity and responsible trading. Each antiquity, antique, and coin lot undergoes thorough examination by a vetting committee of at least ten external specialists, professional trade association members, scientists, and archaeologists: Our Vetting Process
AUCTIONS:
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Complete Unopened 'Discovery' Agate Crystal Geodes
Sold for (Inc. bp): £20
A trio of rounded geodes, each unopened. 518 grams total, 49-69 mm
From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Fossil Fern in Opened Nodule
Cretaceous Period, circa 145-65 million years B.P.Sold for (Inc. bp): £156
An opened oval nodule displaying the positive and negative of the fern fossil. 218 grams total, 9.8-10.2 cm
From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent. -
Massive Cave Stalagmite Section
Sold for (Inc. bp): £20
A colossal cut section of cream-coloured stalagmite showing natural ripples. 76 kg, 105 cm
Previously from a Hong Kong collection. Ex property of a London, UK, gentleman, 1990s.
A stalagmite is an upward-growing mound of mineral deposits growing on the floor of a cave due to the accumulation of material deposited from ceiling drippings. They are typically formed by the deposition of calcium carbonate and other minerals, which are precipitated from mineralised water solutions. Limestone is the chief form of calcium carbonate rock, which is dissolved by water that contains carbon dioxide, forming a calcium bicarbonate solution in underground caverns.
