13 novembre 2015
Amethyst and tourmaline ring, René Boivin, 1946
Amethyst and tourmaline ring, René Boivin, 1946. Estimate 8,000 — 12,000 GBP. Photo Sotheby's Set with a step-cut amethyst between lines of similarly cut tourmalines, size N, signed René Boivin, French assay and indistinct maker's marks. Bibliography:...