Lot 570. A 10.49 carats Burma 'Royal Blue' Sapphire and Diamond Ring. Estimate HK$ 950,000 - 1,200,000 (€ 110,000 - 140,000). Sold for HK$ 1,250,625 (€ 142,980). © Bonhams 2001-2020 The cushion-shaped sapphire, weighing 10.49 carats, within a pear-shaped...