Platinum and diamond ring, Cartier centring a collet-set brilliant-cut diamond between diamond-set crossover shoulders, the diamonds together weighing approximately 0.90 carat, size I1/2;, signed Cartier, numbered C303777. Accompanied by a Cartier box. Provenance: Important Jewels, Smith & Singer (trading as Sotheby's Australia), Sydney, 23 May 2017, lot 139, illustrated. Private Collection, Sydney, acquired from, the above