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_900x900.jpg "Large Rainbow-coloured Carborundum Crystal Display Specimen")
_200x200.jpg "Large Rainbow-coloured Carborundum Crystal Display Specimen")
.jpg "Large Rainbow-coloured Carborundum Crystal Display Specimen")
LOT 2845
Large Rainbow-coloured Carborundum Crystal Display Specimen
6 1/4 in. (1 kg, 16 cm).
A large cluster of silicon carbide showing beautiful iridescence. [No Reserve]
ProvenanceFrom the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.
FootnotesCarborundum rarely occurs in nature, but is commercially formed by heating carbon and silicon at very high temperatures, producing extremely strong bands of crystals.
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:
TimeLine is a leading auction house specialising in antiquities, ancient art, collectables, natural history, coins, medals, and books. Our auctions offer museums, collectors, historians, and enthusiasts the opportunity to acquire unique and historically significant pieces.
LOT 2845
Large Rainbow-coloured Carborundum Crystal Display Specimen
Sold for (Inc. bp): £33
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Historic 'Brazil' Tourmaline Mineral Specimen
Sold for (Inc. bp): £59
Black variety with crystals showing striations, collection number 72. 120 grams, 53 mm
Acquired on the UK mineral and fossil market, since 1970. From the historic mineral collection of Richard Valentine Cain, London, UK, thence by descent. Accompanied by an original historic index file card. -
Massive Fossil Tree Trunk Section
Triassic Period, 251-199 million years B.P.Sold for (Inc. bp): £312
With one polished face showing attractive colouring. 5.45 kg, 27.5 cm
From Madagascar. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK. -
Large Australian Orange Gypsum Mineral Display Specimen
Sold for (Inc. bp): £143
A large specimen of radiating flat prismatic crystals in vibrant orange colour. 464 grams, 14.5 cm
From Australia. Acquired Kettering, UK, in April 2002. 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.
