5 août 2016
Alexandrite and diamond ring
Lot 391. 12.51 carats Ceylon alexandrite and diamond ring. Estimate 115,000 — 170,000 CHF. Lot sold 242,500 CHF. Photo: Sotheby's 2012 The cushion-shaped alexandrite weighing 12.51 carats, set within surrounds of brilliant-cut and baguette diamonds ,...