18 karat gold, platinum, yellow sapphire and diamond brooch, Sterlé, Paris, circa 1960Photo Sotheby's

Designed as a stylized flowerhead set in the center with an oval yellow sapphire weighing approximately 9.50 carats, framed by platinum tendrils set with round and single-cut diamonds, and gold fringe, signed Sterlé, Paris, numbered 9725, French assay marks. Lot 132. Estimation 15,000-20,000 USD

Sotheby's. Magnificent Jewels. New York | 18 avr. 2012, 10:00 AM www.sothebys.com