Lot 18. Gold, Diamond and Colored Diamond Double Clip-Brooch, René Boivin, France, circa 1940. Estimate 25,000 — 35,000 USD. Photo Sotheby's

Designed as a pair of gold flowers set with old European-cut diamonds, one of yellow hue, one flower embellished with antique square-cut diamonds, with French assay and maker's mark; circa 1940.

Literature: Illustrated in René Boivin: Jeweler by Françoise Cailles, page 229.

Please note that the diamond of yellow hue has not been tested for natural color of color.