7 mai 2018
Ruby and diamond ring
Lot 338. Burmese Ruby weighing 7.70 carats and diamond ring. Estimate 345,000 — 430,000 CHF . © Sotheby's 2018 The cushion-shaped ruby weighing 7.70 carats, set between half-moon diamond shoulders, size 511/2. Accompanied by Gübelin report no. 17070140,...