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4 Schiaparelli - Robe papillon © Roger-Viollet 4

Impressive 34.24 carats Burmese star sapphire, sapphire and diamond ring. Estimate HK$2,600,000 – 3,600,000 (US$335,000 – 460,000). Photo Tiancheng International

Centring on a cabochon star sapphire weighing 34.24 carats, to a stylised mount decorated with calibré- and brilliant-cut diamonds enhanced by circular-cut sapphires, the diamonds and sapphires together weighing approximately 2.60 and 5.35 carats respectively, mounted in 18 karat white gold. Ring size: 7¾

Accompanied by SSEF report numbered 76427, dated 24 September 2014, stating that the 34.24 carat star sapphire is natural, Blue colour of medium strong saturation, of Burmese origin, with no indications of heat treatment and with a distinct star effect (asterism);

Gübelin report numbered 0109327, dated 5 October 2001, stating that the 34.24 carat star sapphire is natural, Blue colour, of Burmese origin, with no indications of thermal enhancement.

Tiancheng International. HONG KONG AUTUMN AUCTION. Jewellery and Jadeite. 7 Dec · 1 pm