Tanzanite and diamond necklace, Tiffany & Co., the front designed as a double swag of four collet-set cushion-shaped tanzanites together weighing approximately 19.35 carats, with collet-set brilliant-cut diamond accents and the central diamond bordered by pave-set brilliant-cut diamonds, all set at intervals between baton shaped links similarly set with brilliant-cut diamonds and completed by a similarly set baton link necklace, the diamonds together weighing approximately 2.27 carats, mounted in platinum, inner circumference approximately 410 mm, signed Tiffany & Co. Provenance: Important jewels, Sotheby's Australia, 23 April 2013, lot 126, illustrated. Private collection, Sydney, acquired from the above