LOT 0586 Medieval Gold Ring with Historic Diamond
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15th-16th century AD. A gold ring comprising a D-section hoop with heart-shaped panel to the underside, round bezel with hexafoil panel and triangular void enclosing a historic, very early cut diamond. Cf. Chadour, A.B., Rings. The Alice and Louis Koch Collection, volume I, Leeds, 1994, item 675, for type; see also Boardman, J. & Scarisbrick, D. The Ralph Harari Collection of Finger Rings, London, 1977, item 171, for type.9.22 grams, 26mm overall, 18.14mm internal diameter (approximate size British M 1/2, USA 6 1/2, Europe 13.16 Japan 12) (1"). Property of a North American collector; previously in a UK collection; acquired from a London gallery in the late 1980s; formerly from a private European collection, formed in the 1960s and 1970s, supplied with geological report No. TL005180, by geology consultant Dr R. L. Bonewitz; and an independent specialist report and valuation by graduate gemmologist and jewellery expert, Anna Rogers, GIA GG, BA, Gem-A, ref. no. TBA. Dr. Ronald Bonewitz notes: 'This stone can be considered ‘historic’ in that it illustrates the earliest efforts at actually re-shaping the stone rather than just polishing the natural faces, as was done previously. Not only that, at this time facets were placed more or less at random, but this stone was very deliberately cut into a proper geometric shape. It is an early and rather splendid example of the evolving diamond-cutters art.'
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