Diamond ring, Bucherer

Diamond ring, Bucherer. Photo: Sotheby's

Claw-set with a brilliant-cut diamond weighing 3.20 carats, mounted in white gold, size 51, numbered, maker's marks, case. Estimate 80,000—120,000 CHF. Lot Sold 278,500 CHF.

Accompanied by GIA report no. 16229230 stating that the diamond is D Colour, Internally Flawless.

Pair of diamond earrings, Cartier

Pair of diamond earrings, Cartier. Photo: Sotheby's

Each claw-set with a step-cut diamond weighing respectively 4.25 and 4.42 carats, signed Cartier and numbered. Estimate 200,000—290,000 CHF. Lot Sold 254,500 CHF

Accompanied by GIA reports no. 14785128 and no. 14845573 stating that the diamonds weighing 4.25 and 4.42 carats are respectively D and E Colour, VVS2 Clarity.

Pair of diamond ear studs, Graff

Pair of diamond ear studs, Graff. Photo: Sotheby's

Each claw-set with a brilliant-cut diamond weighing 3.01 carats, mounted in platinum, signed Graff and numbered, case. Estimate 130,000—165,000 CHF. Lot Sold 182,500 CHF

Accompanied by GIA reports no. 14454676 and no. 14430784 stating that the diamonds are both D Colour, VS2 Clarity.

Attractive pair of diamond pendent earrings

Attractive pair of diamond pendent earrings. Photo: Sotheby's

Each designed as a line of three brilliant-cut diamonds weighing respectively 1.51, 1.76, 1.82, 1.87, 2.06 and 2.21 carats , mounted in white gold, illustrated unmounted. Estimate 35,000—55,000 CHF.. Lot Sold 182,500 CHF

Accompanied by two GIA reports: no. 2131304031 stating that the 2.06 carat diamond is E Colour, IF Clarity and no. 2131304044 stating that the 2.21 carat diamond is E Colour, VVS2 Clarity, together with an additional GIA worksheet stating that the 2.21 carat diamond may be Potentially Flawless after repolishing.

Diamond ring

Diamond ring. Photo: Sotheby's

The rectangular step-cut diamond weighing 5.62 carats flanked by tapered baguettes, mounted in platinum, size 51½. Estimate 140,000—200,000 CHF. Lot Sold  164,500 CHF

Accompanied by GIA report no. 5121769574 stating that the diamond is E Colour, VS1 Clarity.

Diamond ring, Graff

Diamond ring, Graff. Photo: Sotheby's

The cut cornered rectangular step-cut diamond weighing 4.14 carats flanked by triangular stones, mounted in platinum, size 56, signed Graff, case. Estimate 140,000—185,000 CHF. Lot Sold 158,500 CHF

Accompanied by GIA report no. 133799338 stating that the diamond is D Colour, Internally Flawless.

Diamond bracelet, circa 1935

Diamond bracelet, circa 1935. Photo: Sotheby's

Of open work geometric design, highlighted with five collet-set marquise-shaped diamonds to surrounds of baguette, single-, circular- and brilliant-cut stones, length approximately 185mm, French assay marks. Estimate 36,000—46,000 CHF. Lot Sold 104,500 CHF

Pair of diamond pendent earrings, Cartier, circa 1925

Pair of diamond pendent earrings, Cartier, circa 1925. Photo: Sotheby's

Each set with single- and circular-cut diamonds, embellished with a rosace motif and fringes, mounted in platinum, signed Cartier and numbered, French assay and indistinct maker's marks. Estimate 12,000—18,000 CHF. Lot Sold 86,500 CHF

Diamond ring2

Diamond ring. Photo: Sotheby's

The circular-cut diamond weighing 5.57 carats, mounted in white gold, size 56½. Estimate 15,000—25,000 CHF. Lot Sold 42,500 CHF

Pair of diamond ear clips, Van Cleef & Arpels

Pair of diamond ear clips, Van Cleef & Arpels. Photo: Sotheby's

Each designed as articulated lines of baguettes to a cluster surmount set with circular-cut diamonds and tapered baguettes, signed Van Cleef & Arpels and numbered, case. Estimate 23,000—32,000 CHF. Lot Sold 35,000 CHF

NOTE: According to Van Cleef & Arpels's archives these ear clips were manufactured in 1939 and were originally set with rubies and diamonds. They were altered in 1948 by Van Cleef & Arpels and the rubies were replaced by diamonds.

Diamond bracelet, circa 1930

Diamond bracelet, circa 1930. Photo: Sotheby's

The flexible band of pierced design millegrain set with single-, circular- and brilliant-cut diamonds and five marquise-shaped stones, to a diamond set buckle, one small diamond deficient, length approximately 180mm. Estimate 17,500—27,000 CHF. Lot Sold 35,000 CHF

GE1102-359-lr-1

Diamond brooch, circa 1920. Photo: Sotheby's

Of pierced design, millegrain set with single-, circular- and brilliant-cut diamonds. Estimate 7,000—9,000 CHF. Lot Sold 26,250 CHF

Pair of diamond brooches and a pair of clips, 1930s

Pair of diamond brooches and a pair of clips, 1930s. Photo: Sotheby's

The brooches each of stylised scroll design, set with tapered baguette and baguette, single-, circular- and brilliant-cut diamonds, mounted in platinum, French assay and indistinct maker's marks; the clips each of circular form set with baguette, brilliant- and step-cut stones. Estimate 9,000—15,000 CHF. Lot Sold 21,250 CHF

Diamond bracelet, 1930s

Diamond bracelet, 1930s. Photo: Sotheby's

The articulated band accented with brilliant-, circular-cut and baguette diamonds, length approximately 178mm. Estimate 14,000—20,000 CHF. Lot Sold 20,000 CHF

Sotheby's. Magnificent Jewels and Noble Jewels, 17 May 11, Geneva www.sothebys.com