Lot 312. Platinum and Diamond Double-Clip Pendant-Brooch, Jean Schlumberger, circa 1960. Estimate 250,000 — 350,000 USD. Photo: Sotheby's.

Designed as a pair of stylized wings, centering two marquise-shaped diamonds weighing 5.28 and 5.22 carats, accented by round and marquise-shaped diamonds weighing approximately 6.00 carats, the detachable carrier further set with marquise-shaped diamonds weighing approximately 4.00 carats, both clips signed Schlumberger; circa 1960.

Provenance: The Collection of Alex & Elisabeth Lewyt, Sotheby's New York, Important Jewels, September 24 2013, lot 509.

Accompanied by GIA report no. 1152471498 stating that the 5.28 carat diamond is E color, VS1 clarity. Together with the original working diagram stating that the diamond may be potentially Internally Flawless.

Accompanied by GIA report no. 2155471494 stating that the 5.22 carat diamond is E color, VS1 clarity.