Lot 892. A Platinum and Diamond Double Feather Brooch, Verdura, 1956. Estimate 10,000 – 15,000 USD. Lot sold 50,000 USD. Photo: Sotheby's 2012

designed as curved feathers, set with two old mine-cut diamonds together weighing approximately 2.45 carats, further enhanced by numerous old mine, single, and baguette-cut diamonds, weighing approximately 15.50 carats, unsigned; may be worn as two clips. 

Sotheby's. Property from the Estate of Brooke Astor. New York, 24 sept. 2012