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LOT 2649
Iridescent Pyrite with Calcite Mineral Specimen
2 in. (43 grams, 53 mm).
An irregular host rock with micro crystals of pyrite and calcite producing an attractive display of colours. [No Reserve]
ProvenanceFrom 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.
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AUCTIONS:
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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.
