A pair of emerald and diamond ear clips, by Herz-Belperron. Photo: Christie's Images Ltd., 2010

Each designed as a fluted emerald bead, suspended from a pavé-set diamond crescent and carved emerald bead surmount, circa 1935, 3.1 cm, with French assay mark for gold. Designed by Suzanne Belperron, with maker's mark for Atelier Groene et Darde. Estimate CHF12,000 - CHF16,000 - Price Realized CHF 56,250

An art deco emerald and diamond ring, by Herz-Belperron. Photo: Christie's Images Ltd., 2010

The octagonal-cut emerald set within a narrow diamond border to the segmented circular-cut diamond surround and shoulders, circa 1935, size 5½, with French assay mark for platinum. Designed by Suzanne Belperron, with maker's mark for Atelier Groene et Darde (partially illegible). Estimate CHF10,000 - CHF15,000 - Price Realized CHF 20,000

A citrine, quartz and peridot cocktail ring, by Herz-Belperron. Photo: Christie's Images Ltd., 2010

Designed as a pyramidal dome set with pear-shaped peridots, citrine and quartz, circa 1960, size 5¾, with French assay mark for gold. Designed by Suzanne Belperron, with maker's mark for Atelier Darde et Fils. Estimate CHF4,000 - CHF6,000 - Price Realized CHF 10,625

An aquamarine ring, by Herz-Belperron. Photo: Christie's Images Ltd., 2010

Set with a rectangular-cut aquamarine, to the wide plain bezel and hoop, circa 1960, size 4½, with French assay marks for platinum and gold. Designed by Suzanne Belperron, with indistinct maker's mark. Estimate CHF7,000 - CHF9,000 - Price Realized CHF 8,750

Christie's. Jewels: The Geneva Sale, 17 November 2010. Geneva www.christies.com