Burmese sapphire and diamond ring, 'Dentelles', Alexandre Reza. Estimate 146,000 — 195,000 CHF. Photo Sotheby's

Set with a cushion-shaped sapphire weighing 14.32 carats, in an open work mount set with marquise-shaped and brilliant-cut diamonds, size 521/2, signed A. Reza, numbered, French assay and maker's marks. 

Accompanied by SSEF report no. 61146, stating that the sapphire is of Burmese origin, with no indications of heating.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 11 nov. 2015, 10:00 AM