7 mai 2018
Diamond ring, M. Gérard, 1970s
![Diamond ring, M. Gérard, 1970s](https://image.canalblog.com/wFK0Ta9wDzXu8rpYHt8uKq7tgvo=/120x120/smart/filters:no_upscale()/http%3A%2F%2Fstorage.canalblog.com%2F10%2F65%2F119589%2F120005156_o.jpg)
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...