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LOT 2786
Large Fossil Trilobite on Matrix
DEVONIAN PERIOD, CIRCA 417-354 MILLION YEARS B.P.
4 1/8 in. (812 grams, 10.4 cm).
Displaying well-defined ribs to the carapace, and good detail to the head. [No Reserve]
ProvenanceFrom Hunstanton, Indiana, USA.
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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Cornuproetus Fossil Trilobite in Matrix
Devonian Period, circa 416-359 million years B.P.Sold for (Inc. bp): £72
Displaying the striking swept-back genal spines. 131 grams, 57 mm
From a Cambridgeshire, UK, collection. -
Rock Crystal Bead Necklace
Sold for (Inc. bp): £111
Composed of graduated cylindrical and biconical beads, some fluted and some facetted, large barrel-shaped bead to the centre; restrung. 146 grams, 64 cm
Ex West country, UK, collection, 2000s. -
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.