7 mai 2018
Diamond ring, M. Gérard, 1970s
Lot 209. Diamond ring weighing 16.82 carats, M. Gérard, 1970s. Estimate 480,000 — 770,000 CHF . © Sotheby's 2018 Set with a marquise-shaped diamond weighing 16.82 carats, size 52, signed M. Gérard, numbered, French assay mark for platinum and maker's...