An exceptional David Webb "Crescent" necklace featuring carved lapis lazuli plaques, approximately 5.25-5.75 carats of round diamonds, hammered 18-karat yellow gold, and platinum. Weighing 261 grams and numbered ES635, this important necklace comes from the collection of renowned philanthropist and collector Irene Roosevelt Aitken. Center Diamond Weight: 5.50 Metal Type: Platinum & 18K Yellow Gold Metal Weight: 261.0 gr. Signed: WEBB Stock: J10607