Tourmaline, rock crystal, and diamond brooch and a ring, Boucheron, circa 1935 - Sothebys

Composed of rock crystal carved in an architectonic design, the brooch set to the centre with a circular-cut tourmaline, the mounting highlighted with similarly cut diamonds, signed Boucheron Paris, French assay and partial maker’s marks; the ring set with a pear-shaped tourmaline, pouch by Boucheron. Estimate:  29,000 – 39,000 CHF

Sotheby's. Magnificent Jewels and Noble Jewels. Genève | 14 mai 2013, www.sothebys.com