A diamond necklace, by Harry Winston. photo Sotheby's Designed as a fringe of graduated pear-shaped diamonds, joined to two rows of graduated marquise-cut diamonds interspersed by brilliant-cut diamonds, mounted in platinum, 40.5 cm long, in navy blue...

A rectangular-shaped diamond ring The rectangular-shaped diamond weighing 5.05 carats to the baguette-cut diamond sides and engraved hoop. Est. £8,000 - £12,000 - Price Realized £15,000 Christie's. Jewellery. 10 June 2009. London, King Street www.chr...

A rectangular-shaped diamond single stone ring The rectangular-shaped diamond weighing 4.11 carats to the baguette-cut diamond shoulders and plain hoop. Estimate £12,000 - £15,000 ($19,392 - $24,240) - Price Realized £23,750 ($38,380) Christie's. Jewellery....

A rectangular-shaped diamond single-stone ring The rectangular-shaped diamond to the decorated shoulders and gallery mounted with single-cut diamonds, circa 1920. Estimate £20,000 - £30,000 ($31,660 - $47,490) Christie's. Jewellery. 10 June 2009. London,...