Tourmaline, rock crystal and diamond brooch and a ring, Boucheron, circa 1935. Photo courtesy Sotheby's

Each composed of rock crystal carved in an architectonic design, the brooch centring on a circular-cut tourmaline, the mounting highlighted with similarly cut diamonds, signed Boucheron, French assay and partial maker's marks, the ring featuring a pear-shaped tourmaline, size 53, pouch stamped Boucheron. Estimation  9,500 — 14,000 CHF 

Sotheby's. Magnificent Jewels. Genève | 13 nov. 2013 - www.sothebys.com