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LOT 2622
Massive Amethyst Crystal Point Group [3]
4 1/2 - 6 1/4 in. (3.12 kg total, 11.4-16 cm).
Comprising three very large dark prismatic points. [3, No Reserve]
ProvenanceFrom Brazil.
Ex Mineral Imports, London, UK.
Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.
TimeLine 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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Polished Fossil Goniatite Ammonite Pair
Devonian Period, circa 417-354 million years B.P.Sold for (Inc. bp): £26
Comprising two Goniatite sp. specimens, each polished to show internal structure. 201 grams total, 73 mm each
From Atlas Mountains, Morocco, North Africa. From a Cambridgeshire, UK, collection. -
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Large Rainbow-coloured Carborundum Crystal Display Specimen
Sold for (Inc. bp): £33
A large cluster of silicon carbide showing beautiful iridescence. 1 kg, 16 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.
Carborundum rarely occurs in nature, but is commercially formed by heating carbon and silicon at very high temperatures, producing extremely strong bands of crystals. -
Iridescent Pyrite with Calcite Mineral Specimen
Sold for (Inc. bp): £7
An irregular host rock with micro crystals of pyrite and calcite producing an attractive display of colours. 43 grams, 53 mm
From Abbeyton Quarry, Ballysadare, County Sligo, Ireland, October 1998. 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.
