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Fancy vivid yellow diamond ring, Christopher Designs. Photo Sotheby's

The heart-shaped modified brilliant-cut diamond of fancy vivid yellow color weighing 10.05 carats, framed by round diamonds, mounted in platinum and 22 karat gold, size 6½, signed Christopher, numbered K6036. Est. 400,000—500,000 USD. Lot Sold 482,500 USD

NOTE: Accompanied by GIA report no. 13054615 stating Fancy Vivid Yellow, Natural Color, VS2 clarity.

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Fancy vivid yellow diamond ring, Chopard. Photo Sotheby's

The round diamond of fancy vivid color weighing 4.01 carats, framed by round diamonds weighing approximately .90 carat, mounted in platinum, size 6½, signed Chopard. Est. 150,000—200,000 USD. Lot Sold 170,500 USD

NOTE: Accompanied by GIA report no. 13255729 stating Fancy Vivid Yellow, Natural Color.

Together with a certificate of origin from Chopard.

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Fancy intense yellow diamond ring. Photo Sotheby's

The cut-cornered rectangular modified brilliant-cut diamond of fancy intense yellow color weighing 6.69 carats, flanked by trapeze-cut diamonds weighing approximately 1.10 carats, mounted in 18 karat gold and platinum, size 6. Est. 100,000—150,000 USD. Lot Sold 122,500 USD

NOTE: Accompanied by GIA report no. 16199093 stating Fancy Intense Yellow, Natural Color, VVS2 clarity.

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Pair of fancy intense yellow diamond earstuds. Photo Sotheby's

The cut-cornered rectangular modified brilliant-cut diamonds of fancy intense yellow color weighing 3.18 and 3.02 carats, mounted in 18 karat gold. Est. 75,000—100,000 USD. Lot Sold 92,500 USD

NOTE: Accompanied by GIA report no. 12550542 stating that the 3.18 carat diamond is Fancy Intense Yellow, Natural Color, VVS1 clarity; and report no. 11734069 stating that the 3.02 carat diamond is Fancy Intense Yellow, Natural Color, VS2 clarity.

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Pair of fancy colored diamond pendant-earrings. Photo Sotheby's

Set with pear-shaped diamonds of fancy light yellow and light yellow color weighing 3.09 and 3.65 carats, small pear-shaped diamonds of yellow hue weighing approximately 3.80 carats, and round near colorless diamonds weighing approximately .75 carat, mounted in 18 karat gold and platinum. Est. 40,000—50,000 USD. Lot Sold 52,500 USD

NOTE: Accompanied by GIA report no. 16249733 stating that the 3.09 carat pear-shaped diamond is Fancy Light Yellow, Natural Color, VS1 clarity; report no. 16295281 stating that the 3.65 carat pear-shaped diamond is Light Yellow, Natural Color; report no. 15858771 stating that the .40 carat pear-shaped diamond is Fancy Yellow, Natural Color; and report no. 15858778 stating that the .46 carat pear-shaped diamond is Fancy Light Yellow, Natural Color.

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Fancy intense yellow diamond ring. Photo Sotheby's

The cushion-shaped modified brilliant-cut diamond of fancy intense yellow color weighing 3.36 carats, framed and flanked by round diamonds weighing approximately 1.20 carats, mounted in 18 karat gold and platinum, size 5¾.. Est. 40,000—60,000 USD. Lot Sold 50,000 USD

NOTE: Accompanied by GIA report no. 16854709 stating Fancy Intense Yellow, Natural Color, VS2 clarity.

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Colored diamond and diamond bracelet. Photo Sotheby's

Set with oval diamonds of yellow hue weighing approximately 8.70 carats, alternating with oval near colorless diamonds weighing approximately 7.25 carats, mounted in 18 karat gold and platinum, length 7 1/8 inches. Est. 35,000—45,000 USD. Lot Sold 43,750 USD

NOTE: Accompanied by 3 GIA reports stating that 3 oval diamonds are Fancy Yellow, Natural Color.

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Pair of fancy intense yellow diamond earrings. Photo Sotheby's

Set with cut-cornered square modified brilliant-cut diamonds of fancy intense yellow color weighing 2.03 and 1.86 carats, framed by round diamonds of yellow hue weighing approximately .30 carat, and round near colorless diamonds weighing approximately .50 carat, mounted in 18 karat gold and platinum. Est. 30,000—40,000 USD. Lot Sold 33,750 USD

NOTE: Accompanied by two GIA reports no. 15658005 and no. 5101239706 stating that the 2.03 carat and 1.86 carat diamonds are Fancy Intense Yellow, Natural Color, VS1 clarity.

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18 karat gold and yellow diamond bracelet. Photo Sotheby's

Set with cut-cornered rectangular modified brilliant-cut diamonds of yellow hue weighing approximately 16.00 carats, length 7 inches. Est. 15,000—20,000 USD. Lot Sold 25,000 USD

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Fancy yellow diamond ring. Photo Sotheby's

The modified cut-cornered rectangular brilliant-cut diamond of fancy yellow color weighing 3.01 carats, flanked by 2 modified trapeze-cut diamonds, mounted in 18 karat gold and platinum, size 6½. Est. 15,000—20,000 USD. Lot Sold 18,750 USD

NOTE: Accompanied by GIA report no. 2115346395 stating Fancy Yellow, Natural Color, VS1 clarity

Sotheby's. Important Jewels. 03 Feb 10. New York www.sothebys.com