Lot 548. Sapphire and 8.53 carats D Colour, VS1 Clarity diamond ring, Cusi. Estimate 150,000 — 250,000 CHF. Lot sold 1,482,500 CHF. Photo: Sotheby's 2012

Of crossover design, set with a pear-shaped sapphire and a pear-shaped diamond weighing 8.53 carats, the mount highlighted with baguette diamonds, size 48, signed Cusi, French assay and maker's marks.

Accompanied by GIA report no. 2145866795, stating that the diamond is D Colour, VS1 Clarity.

Sotheby's. Magnificent Jewels, Geneva, 14 Nov 2012