Step-cut, square brilliant-cut, baguette, cut-cornered rectangular step-cut, step-cut diamonds

Fine Diamond ring. photo courtesy Sotheby's

Set with a step-cut diamond weighing 12.31 carats, between tapered baguette diamond shoulders, mounted in platinum, size 51. Est. 700,000—900,000 CHF. Lot sold 1,202,500 CHF.

Accompanied by GIA report no. 2125388458 stating that the diamond is D Colour, Internally Flawless.

Diamond ring. photo courtesy Sotheby's

Set with a square modified brilliant-cut diamond weighing 9.37 carats, on a platinum mount, size 52½. Est.230,000—330,000  CHF. Lot Sold 362,500 CHF

Accompanied by GIA report no. 5121388446 stating that the diamond is D Colour, VS2 Clarity.

Diamond bracelet. photo courtesy Sotheby's

The flexible band composed of five rows of baguette diamonds, mounted in white gold, length approximately 165mm. Est. 140,000—180,000 CHF. Lot sold 314,500 CHF

Diamond ring. photo courtesy Sotheby's

The cut-cornered rectangular step-cut diamond weighing 5.81 carats, flanked by tapered baguettes, mounted in platinum, size 52. Est.130,000—200,000  CHF. Lot Sold 158,500 CHF

Accompanied by GIA report no. 5111714796 stating that the diamond is E Colour, VS2 Clarity.

Diamond ring. photo courtesy Sotheby's

Centring on a step-cut diamond weighing 7.13 carats, between shoulders set with baguettes, mounted in platinum, size 51½. Est. 120,000—180,000 CHF. Lot Sold 158,500 CHF

Accompanied by GIA report no. 1122360913 stating that the diamond is H Colour, VVS2 Clarity.

Diamond ring, Chaumet. photo courtesy Sotheby's

The cut cornered rectangular step-cut diamond weighing 6.19 carats, set between baguette diamond shoulders, mounted in platinum, size 51, signed Chaumet Paris, French assay and maker's marks. Est. 55,000—80,000 CHF. Lot sold 146,500 CHF.

Accompanied by GIA report no. 2125645415 stating that the diamond is H Colour, VS1 Clarity.

Diamond ring. photo courtesy Sotheby's

The cut-cornered rectangular step-cut diamond weighing 12.07 carats, flanked by tapered baguette diamonds, size 53½. Est. 50,000—80,000 CHF. Lot sold 122,500 CHF

Pair of diamond earrings. photo courtesy Sotheby's

Each set with a step-cut diamond weighing respectively 5.14 and 5.60 carats, mounted in platinum. Est. 40,000—60,000 CHF. Lot sold 116,500 CHF

Diamond ring. photo courtesy Sotheby's

Centring on a cut-cornered rectangular step-cut diamond weighing 5.16 carats, between baguette diamond shoulders, mounted in white gold, size 50. Est. 82,000—122,000 CHF. Lot sold 104,500 CHF

Accompanied by GIA report no. 1122645417 stating that the diamond is H Colour, VVS1 clarity. Together with an additional GIA worksheet stating that the diamond may be Potentially Flawless after repolishing.

Sotheby's. Magnificent Jewels, 16 Nov 10, Geneva www.sothebys.com