Bidders in the New Bond Street saleroom, online, and on the telephones, competed for 129 lots during the auction which achieved £4.98 million with 88% lots sold by value.
Gracing the front cover of the sale catalogue and headlining the sale was a 15.52 carat step-cut diamond single-stone ring by Harry Winston. The diamond attracted interest from across the globe and went to a telephone bidder for £1,094,500 against its pre-sale estimate of £700,000-£900,000.
A pair of marquise-cut and pear-shaped diamond earrings, also by the famed American jeweller, proved similarly popular with bidders. The earrings, totalling 25.37 carats,, were the subject of fierce bidding, eventually selling for £266,500 against their pre-sale estimate of £150,000-£200,000.
Elsewhere in the sale, an antique cushion-shaped diamond bangle featuring 13 graduated diamonds, including a central 9.50 carats Fancy Yellow diamond, sold for £206,500.
A striking Kashmir cabochon sapphire, weighing 7.13-carats, was one of the sale’s other star performers, selling to a telephone buyer for £506,500 against its pre-sale estimate of £50,000-£70,000. The unheated sapphire, set in a ring surrounded by old brilliant-cut diamonds, boasts the coveted ‘Royal Blue’ colour, a term reserved only for the very best examples of these rare gemstones.
Another Bonhams’ client successfully bid for a rare oval-cut pink sapphire from Burma, weighing 17.15 carats. The sapphire, set in a ring by Cartier, sold for £140,500 against its pre-sale estimate of £30,000-£40,000.
Jean Ghika, Head of Bonhams Jewellery for UK and Europe, said: “The sale performed exceptionally well, generating interest from buyers in the UK, Europe, the US and Asia.
“We were delighted to see our headline lots achieve strong prices, demonstrating that top quality diamonds, coloured gemstones and signed jewels remain highly desirable.”
A private collection of bird brooches by Cartier also proved popular with bidders. Collected during the 1960s, each of the five birds featured a different gemstone. The collection reached a total of £123,750, demonstrating the enduring appeal of signed jewellery.