Bonhams 1793 : A sapphire and diamond ring

Set with an oval-cut sapphire, flanked by a pair of trillion-cut diamonds, mounted in platinum, the sapphire estimated to weigh approximately 9.00 carats, the diamonds estimated to weigh approximately 1.20 carats in total, ring size 6

Estimate:

HK$ 350,000 - 420,000
US$ 45,000 - 54,000
£30,000 - 36,000