Lot 218. A spectacular 14.65 carats Kashmir octagonal step-cut sapphire and diamond ring. Estimate CHF 1,700,000 - CHF 2,700,000 (USD 1,715,455 - USD 2,724,545). Price realised CHF 1,687,500. Photo Christie's Images Ltd 2016.

Set with an octagonal step-cut sapphire, weighing approximately 14.65 carats, between rectangular-cut diamond shoulders, ring size 4 ¾, with French assay mark for platinum.

Accompanied by report no. 87877 dated 20 September 2016 from the SSEF Swiss Gemological Institute stating that the origin of the sapphire is Kashmir, with no indications of heating, and an Appendix letter stating that this sapphire combines '... a highly attractive blue colour and an excellent purity'.

Report no. 16090005 dated 12 September 2016 from the Gübelin GemLab stating that the origin of the sapphire is Kashmir, with no indications of heating, an Appendix stating that this sapphire 'possesses a richly saturated and homogeneous colour, combined with a high degree of transparency, and a finely proportioned cut', and an Information Sheet on 'Unheated sapphires'.

Christie's. Geneva Magnificent Jewels, 15 November 2016, Geneva