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LOT 2707
Spherical Sedimentary Concretion
4 in. (647 grams, 10.2 cm).
Naturally formed from hardened sediment with projecting porous, black stone nodules. [No Reserve]
ProvenanceAcquired on the UK art market in the 1990s.
From the Dr Ince collection, N.W. London, UK.
A concretion is a compact mass of mineral matter, usually spherical or disc-shaped, and they vary greatly in size. They usually form early in the burial history of sediment, before the rest of the sediment has hardened into solid rock. Concretions occur when a considerable amount of cementing material collects locally around a nucleus, often organic (a leaf, tooth, a section of fossil or shell or dead matter) and commonly a marine invertebrate.
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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Chalcopyrite Mineral Specimen Group
Sold for (Inc. bp): £13
A group of irregular iridescent chalcopyrite samples showing purple, red, gold and blue colouration. 1 kg total, 20-29 mm
Fine condition.
From Mexico. Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's). From the private collection of John Meredith, acquired since the 1990s; thence by descent. -
Fossil 'Woolly Mammoth' Knuckle Bone
Holocene Epoch, Devensian, 110,000-12,000 years B.P.Sold for (Inc. bp): £33
Displaying good detail, possibly from a Mammuthus Primigenius. 152 grams, 88 mm
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. -
Aridal 010 (ABRA) Primative Achondrite Brachinite Meteorite Slice
Sold for (Inc. bp): £52
A cut irregular slice displaying dark brownish colour. 10.29 grams, 61 mm
Found Boujdour, Western Sahara, South Morocco, North Africa, 24 April 2013. Ex S.V. Meteorites. Ex USA market. From the private collection of a Leicestershire, UK, gentleman. Accompanied by a Sergey Vasiliev dealer card and a Swiss membrane box.
