Lot 67. 11.14 carats Burmese "Royal Blue" Sapphire and Diamond Ring. Estimate HK$1,250,000 - 1,850,000 (US$160,000 - 238,000). Unsold. © Tiancheng International.
Centring on an oval sapphire weighing 11.14 carats, surrounded by ten brilliant-cut diamonds together weighing 5.92 carats, mounted in platinum. Ring size: 5¼
Accompanied by GIA report numbered 1167172721, dated 30 October 2013, stated that the 11.14 carat sapphire is natural, Deep Blue colour, of Burmese origin, with no indications of heating; with comments, stating that 'The color appearance of this stone is described in the trade as "Royal Blue".'; along with a letter, stating that 'This sapphire exhibits a highly saturated blue coloration known in the trade as Royal Blue...The combination of the Burma (Myanmar) origin, large size, no indications of heating, highly saturated blue color and high degree of transparency, make this a notable sapphire.';
Gübelin report numbered 13116036, dated 19 November 2013, stating that the 11.14 carat sapphire is natural, Blue colour, of Burmese origin, with no indications of heating; with condition, stating that 'Sapphires which have not been heated are scarce.'; along with an information sheet, stating that 'The demand for natural, unheated sapphires kept growing while the supply of such gems remains limited, making large, natural sapphires of gem-quality from all major sources...difficult to find.';
ten GIA reports, stating that the 5.92 carat diamonds ranging from 0.62 to 0.58 carat are F to G colour, VVS2 to VS2 clarity, nine with Excellent Cut, Polish and Symmetry; one with Excellent Cut.