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Important and rare Kashmir Sapphire and Diamond ring. photo Sotheby's

Set with a cushion-shaped sapphire weighing 18.08 carats, flanked by two similarly-cut diamonds together weighing 2.96 carats, mounted in platinum. Estimate Upon Request - Sold 11,748,000 HKD

Ring size: 5 3/4

Accompanied by AGTA, AGL and Gübelin reports stating that the 18.08 carat sapphire is natural, of Kashmir origin, with no indications of heating. Sapphires which have not been heated are scarce; also accompanied by a special AGTA portfolio "Kashmir Sapphire JewelFolio No.0012", stating that the sapphires of Kashmir form an exclusive class of their own, the quality and size of this sapphire is exceptional for this locality. Also accompanied by two GIA reports, numbered 15272410 and 15272447, dated 9 and 11 October 2006, stating that the 1.45 and 1.51 carat diamonds are E colour, VVS1 and VS2 clarity respectively.

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Pair of Sapphire and Diamond ear studs. photo Sotheby's

Each centring on a square mixed-cut sapphire weighing 2.65 and 2.21 carats respectively, encircled by fancy shaped diamonds altogether weighing approximately 5.25 carats, to an outer surround of circular-cut sapphires, mounted in 18 karat white and blackened gold. Est. 580,000—650,000 HKD - Sold 716,000 HKD

Accompanied by Gübelin report numbered 0908163 / 1 and 2, dated 26 August 2009, stating that the 2.65 and 2.21 carat sapphires are natural, of Kashmir origin, with no indications of heating.

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Sapphire and Diamond Ring. photo Sotheby's

Centring on a cushion-shaped sapphire weighing 4.49 carats, surrounded by pear-shaped rose- and brilliant-cut diamonds together weighing approximately 1.45 carats, mounted in 18 karat white gold. Est. 140,000—180,000 HKD - Sold 300,000 HKD

Ring size: 6

Accompanied by GRS report numbered GRS2008-011083, date 7 January 2008, stating that the 4.49 carat sapphire is natural, of Kashmir origin, with no indication of thermal treatment

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Colour Change Sapphire and Diamond ring. photo Sotheby's

Centring on a cushion-shaped colour-changing sapphire weighing 10.63 carats, surrounded by inverted brilliant-cut diamonds, decorated to the basket by circular-cut sapphires, to the brilliant-cut diamond shank, the diamonds and sapphires together weighing approximately 3.00 and 1.70 carats respectively, mounted in 18 karat white gold. Est. 160,000—200,000 HKD - Sold 262,500 HKD

Ring size: 5 3/4

Accompanied by SSEF report numbered 53909, dated 2 June 2009, stating that the 10.63 carat sapphire is natural, of Ceylon (Sri Lanka) origin, with a moderate colour-change and no indications of heating.

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Sapphire and Diamond wrist watch, The Royal Diamond. photo Sotheby's

The rectangular dial concealingly-set with square-cut sapphires bordered by brilliant-cut diamonds, the stylised bezel embellished to the edges with brilliant-cut diamonds, completed by a blue leather strap and diamond-set buckle, the sapphires and diamonds together weighing approximately 4.15 and 2.00 carats respectively, mounted in 18 karat white gold, quartz movement, dial, case back and strap signed, caseback additionally signed 'DUE' and numbered BA99W, buckled length approximately 155 to 185mm. Est. 95,000—120,000 HKD - Sold 137,500 HKD

Accompanied by a signed box and certificate.

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Sapphire and Diamond Ring. photo Sotheby's

Simply set with an oval sugar loaf cabochon sapphire weighing approximately 12.00 carats, flanked by old European-cut diamonds, mounted in platinum. Est. 80,000—120,000 HKD - Sold 118,750 HKD

Ring size: 5 3/4

Accompanied by AGL report numbered CS36267, dated 24 April 2003, stating that the 12.00 carat sapphire is natural, of Ceylon (Sri Lankan) origin, with no gemological evidence of heat enhancement present.

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Sapphire and Diamond Bracelet. photo Sotheby's

The semi-flexible bracelet of geometric design, composed of square-cut sapphires and brilliant-cut diamonds altogether weighing approximately 16.35 and 6.20 carats respectively, mounted in 18 karat white gold, length approximately 190mm. Est. 40,000—60,000 HKD. Sold 52,500 HKD

Sotheby"s. Magnificent Jewels & Jadeite. 07 Oct 09. Hong Kong www.sothebys.com