Lot 417. Impressive 107.79 carats Ceylon sapphire and diamond brooch-ring combination, Harry Winston. Estimate 480,000 — 770,000 CHF (438,680 - 703,715 EUR). Photo Sotheby's

The brooch of floral design, set with a cushion-shaped sapphire weighing 107.79 carats, within a frame of cushion-shaped and circular-cut diamonds, unsigned, maker's mark for Jacques Timey, pendant hoop, additional gold chain unillustrated; together with a ring mount set with two triangular diamonds, size 52, sizing band, unsigned, maker's mark for Jacques Timey. 

Accompanied by SSEF report no. 80458, stating that the sapphire is of Ceylon origin, with no indications of heating, together with an appendix letter.

"The described sapphire exhibits a highly impressive size and weight of 107.793 ct, combined with a beautifully saturated blue colour and an outstanding purity". Excerpt from the SSEF appendix letter