Lot 75. 46.65 carats 'Royal Peacock Blue' Sri Lankan cushion-shaped sapphire and diamond ring. Estimate HK$2,800,000 - 3,800,000 (US$360,000 - 487,000) & Lot 76. 25.11 carats, VS1 clarity Fancy Deep Brownish Yellow cut-cornered rectangular modified brilliant-cut diamond and diamond ring. Estimate HK$2,500,000 - 3,500,000 (US$320,000 - 450,000). Courtesy Tiancheng International.

Lot 75. 46.65 carats 'Royal Peacock Blue' Sri Lankan cushion-shaped sapphire and diamond ring. Estimate HK$2,800,000 - 3,800,000 (US$360,000 - 487,000). Courtesy Tiancheng International.

Centring on a cushion-shaped sapphire weighing 46.65 carats, to a stylised basket embellished with pear-shaped and brilliant-cut diamonds together weighing approximately 2.70 carats, mounted in 18 karat white gold. Ring size: 6 

Accompanied by SSEF report numbered 84404, stating that the 46.65 carat sapphire is natural, Blue colour of medium strong saturation, of Ceylonese (Sri Lankan) origin, with indications of heating; 

Lot 76. 25.11 carats, VS1 clarity Fancy Deep Brownish Yellow cut-cornered rectangular modified brilliant-cut diamond and diamond ring. Estimate HK$2,500,000 - 3,500,000 (US$320,000 - 450,000). Courtesy Tiancheng International. 

Centring on a cut-cornered rectangular modified brilliant-cut brown diamond weighing 25.11 carats, to a stylised basket set with brilliant-cut diamonds extending to the split shoulders, the diamonds together weighing approximately 1.40 carats, mounted in 18 karat yellow gold. Ring size: 5½