Yellow diamond Jewelry @ Sotheby's, Magnificent Jewels and Jadeite. 06 Apr 11. Hong Kong

Impressive Fancy Brown-Yellow diamond  and diamond necklace. Photo Sotheby's

Suspending a fancy brown yellow briolette diamond weighing 56.25 carats, to a stylised necklace of arbesque form, set with baguette, tapered baguette and brilliant-cut diamonds, the diamonds together weighing approximately 16.00 carats, mounted in platinum, length approximately 390mm, necklace signed Cartier and numbered 57-G3174. Estimate 6,000,000—7,800,000 HKD. Lot Sold 7,220,000 HKD

Accompanied by GIA report numbered 15022715, dated 14 April 2010, stating that the 56.25 carat diamond is natural, Fancy Brown-Yellow colour, VS1 clarity; also accompanied by a signed box.

Fancy Vivid Yellowish Green diamond. Photo Sotheby's

Modelled as a calla lily, set with a pear-shaped fancy vivid yellowish green diamond weighing 1.13 carats, decorated throughout with brilliant-cut diamonds and edged by brilliant-cut pink diamonds together weighing approximately 1.60 carats, mounted in 18 karat white and blackened gold. Estimate 4,000,000—4,500,000 HKD. Lot Sold 6,020,000 HKD

Ring size: 5¾

Accompanied by GIA report numbered 1102193346, dated 29 September 2008, stating that the 1.13 carat diamond is natural, Fancy Vivid Yellowish Green colour, VS2 clarity.

Pair of Fancy Intense Yellow diamond and diamond pendent earrings. Photo Sotheby's

Each suspending on a pear-shaped fancy intense yellow diamond weighing 5.87 and 5.09 carats respectively, framed by brilliant-cut yellow diamonds, surmounted by two brilliant-cut diamonds altogether weighing 2.16 carats, mounted in platinum and 18 karat yellow gold. Estimate 1,650,000—2,000,000 HKD. Lot Sold 2,060,000 HKD

Accompanied by GIA certificates numbered 1122639942 and 2125692370, dated 22 December 2010 and 28 January 2011, stating that the 5.09 and 5.87 carat diamonds are natural, Fancy Intense Yellow colour, VS2 and VVS2 clarity respectively; also accompanied by four GIA reports stating that the 0.33 to 0.75 carat diamonds are D to E colour, VVS1 to VS1 clarity.

Fancy intense yellow diamond and diamond ring. Photo Sotheby's

Centring on a brilliant-cut fancy intense yellow diamond weighing 9.35 carats, to an elevated mount set on the corners with brilliant-cut diamonds extending to the shank, the diamonds together weighing approximately 4.00 carats, mounted in 18 karat yellow gold, ring guard fitting. Estimate 1,400,000—1,600,000 HKD. Lot Sold 1,700,000 HKD

Ring size: 5¼

Accompanied by GIA report numbered 1112485262, dated 15 December 2009, stating that the 9.35 carat diamond is natural, Fancy Intense Yellow colour, Internally Flawless clarity.

Pair of

Each suspending on a cushion-shaped fancy yellow diamond weighing 5.00 and 5.05 carats respectively, framed by circular-cut yellow diamonds, to a surmount set with oval diamonds, the yellow diamonds and diamonds altogether weighing approximately 4.30 carats, mounted in platinum and 18 karat yellow gold. Estimate 900,000—1,000,000 HKD. Lot Sold 1,340,000 HKD

Accompanied by GIA reports numbered 2111027157 and 14700200, dated 12 April 2010 and 31 October 2005 respectively, stating that the 5.00 and 5.05 carat diamonds are natural, Fancy Yellow colour, VS2 and VVS1 clarity respectively.

Yellow diamond and diamond demi-parure. Photo Sotheby's

The necklace composed of forty radiant-cut diamonds of light yellow hue together weighing approximately 26.65 carats, each framed and joined by brilliant-cut diamonds together weighing 7.65 carats, length approximately 430mm; a bracelet of matching design, the light yellow diamonds and diamonds together weighing approximately 10.40 and 2.65 carats respectively, length approximately 160mm; a pair of matching earrings and a matching ring, the light yellow diamonds and diamonds altogether weighing approximately 5.50 and 1.45 carats respectively; mounted in 18 karat yellow and white gold. (4). Estimate 480,000—550,000 HKD. Lot Sold 500,000 HKD

Ring size: 6

Fancy intense yellow diamond, fancy light yellow diamond and diamond pendant. Photo Sotheby's

Modelled as stylised angel, suspending on a pear-shaped fancy intense yellow diamond weighing 2.02 carats, surmounted by a modified heart-shaped fancy light yellow diamond weighing 2.31 carats, flanked on each side by a pear-shaped diamond weighing 0.42 and 0.54 carat respectively, accompanied by a yellow gold chain, mounted in 18 karat yellow and white gold, length approximately 390mm. Estimate 180,000—220,000 HKD. Lot Sold 400,000 HKD

Accompanied by GIA reports numbered 1122768043 and 2111071398, stating that the 2.02 and 2.31 carat diamonds are natural, Fancy Intense Yellow and Fancy Light Yellow colour, Internally Flawless and VS1 clarity respectively; also accompanied GIA reports numbered 2106698784 and 2121212836, stating that the 0.54 and 0.42 carat diamonds are D colour, VS2 and VS1 clarity respectively.

Sapphire and yellow diamond Panther brooch, Cartier. Photo Sotheby's

Modelled as a panther pavé-set throughout with brilliant-cut yellow diamonds, flecked with calibré-cut sapphires, accented by emerald-set eyes and an onyx-set nose, mounted in 18 karat yellow gold, signed Cartier London and numbered R7780.. Estimate 220,000—300,000 HKD. Lot Sold 275,000 HKD

Accompanied by a signed box.

Pair of Fancy Dark Gray-Yellowish Green Diamond and Diamond earrings. Photo Sotheby's

Each centring on a modified square brilliant-cut diamond weighing 2.75 and 2.82 carats respectively, surrounded by a double-frame set with diamonds of pink and yellow hues altogether weighing approximately 2.50 carats, mounted 18 karat yellow gold. Estimate 120,000—160,000 HKD
Lot Sold 250,000 HKD

Accompanied by GIA reports numbered 1122931899 and 1122931917, dated 13 January 2011, stating that the 2.75 and 2.82 carat diamonds are natural, Fancy Dark Gray-Yellowish Green colour, SI1 and VS2 clarity respectively.

Light Brownish Greenish Yellow diamond and diamond ring. Photo Sotheby's

Centring on a cushion-shaped fancy light brownish greenish yellow diamond weighing 2.51 carats, surrounded by brilliant-cut diamonds extending to the shoulders, mounted in 18 karat yellow gold. Estimate 58,000—80,000 HKD. Lot Sold 93,750 HKD

Ring size: 5½

Accompanied by GIA report numbered 17448328, dated 25 July 2008, stating that the 2.51 carat diamond is natural, Fancy Light Brownish Greenish Yellow colour, VVS2 clarity.

Sotheby's, Magnificent Jewels and Jadeite. 06 Apr 11. Hong Kong www.sothebys.com