Late 18th / early 19th century graduated diamond collet necklace, c.1800,

19th century diamond, pearl and gem set harp brooch probably by Luigi Pallotti, Venice c.1890,

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Pair of antique blue guilloche and cushion cut diamond oval cufflinks by William John Hutchinson, English c.1900, together with a pair of matching studs,

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Aquamarine and diamond strap bracelet, c.1920

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19th century citrine intaglio pendant by Luigi Pichler, depicting Marie Louise, second wife of Napoleon Bonaparte,

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Gold and diamond cone link bracelet by Marchak, Paris, after the Chapeau Chinois design by Van Cleef & Arpels,

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Early 20th century rectangular emerald and diamond cluster ring, c.1910, centred by a 3.59ct Colombian emerald of canted step-cut,

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