A Magnificent and Rare Fancy Vivid Pink Diamond Ring. Estimate 1,500,000—2,000,000 USD. Lot Sold 1,874,500 USD. Photo Sotheby's

The cushion-shaped diamond of fancy vivid pink color weighing 3.64 carats, the mounting set throughout with small round diamonds, mounted in 18 karat white gold, size 5½.

Accompanied by GIA report no. 12625999 stating that the diamond is Fancy Vivid Pink, Natural Color, VVS1 clarity.

18 Karat Two-Color Gold and Fancy Pink Diamond Ring. Estimate 625,000—675,000 USD. Lot Sold 824,500 USD. Photo Sotheby's

The pear-shaped diamond of fancy pink color weighing 5.04 carats, flanked by pear-shaped near colorless diamonds, mounted in 18 karat white and pink gold, size 6¼. 

Accompanied by GIA report no. 8572825 (dated April 20, 1995) stating that the diamond is Fancy Pink, Natural Color, VS2 clarity.

Platinum, 18 Karat Pink Gold and Fancy Light Pink Diamond Ring. Estimate 125,000—150,000 USD. Lot Sold 164,500 USD. Photo Sotheby's

The oval diamond of fancy light pink color weighing 3.00 carats, framed and flanked by small round near colorless diamonds weighing approximately .35 carat, size 5¾. 

Accompanied by GIA report no. 5101843123 stating that the diamond is Fancy Light Pink, Natural Color, SI2 clarity.

Sotheby's. Magnificent Jewels, 14 Apr 11, New York www.sothebys.com