Lot 13. Diamond ring, Suzanne Belperron, 1956. Estimate 16,000 — 21,000 CHF . Lot sold 127,500 CHF. Photo Sotheby's 2015. Of bombé design, set with baguette diamonds, size 48, French assay and partial maker's marks. Accompanied by a certificate from Olivier...

Emerald ring, Bulgari, 1970s. Photo Sotheby's. Claw-set with a cabochon emerald weighing 26.34 carats, signed Bulgari, case by Bulgari, size 60. Estimation 180,000 — 220,000 CHF Accompanied by SSEF report no. 31459, dated 11 February 1998, and no. 68104,...

Important Colombian Emerald Ring. Photo courtesy M. S. Rau Antiques. An outstanding, 9.28-carat Colombian emerald exhibits perfect color in this captivating ring. Displaying an intense, "Old Mine" green hue and incredible clarity, this octagonal step-cut...

An art deco emerald ring, circa 1920. Photo courtesy Bonhams. The step-cut emerald, weighing 19.15 carats, between shoulders set with trios of brilliant-cut diamonds, mounted in platinum, French assay mark, ring size K. Estimate £20,000 - 25,000 (€24,000...