A magnificent late art deco diamond ring is the highlight of the Bonhams Fine Jewellery sale which will take place in New Bond Street - London on September 22nd. The Asscher-cut diamond, weighing 6.82 carats, is D colour, potentially flawless and Type IIa. Type IIa diamonds are the most chemically pure type of diamond and possess exceptional optical transparency. Famous gem diamonds that are Type IIa include the Cullinan I and the Koh-i-noor.
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This ring, estimated at £150,000-200,000, has never before been seen at auction.
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The sale also features two other impressive gem-quality diamond rings: a brilliant-cut diamond, weighing 3.00 carats, D colour, Internally Flawless, estimated at £70,000 – 90,000 and a pear-shaped diamond, weighing 5.00 carats, D colour, VS2 clarity, estimated at £80,000 – 100,000.
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Bonhams also presents a superb selection of antique 19th century jewellery, which is seen increasingly infrequently on the market. A late 19th century sapphire and diamond necklace, estimated at £45,000 - 55,000 and an early 19th century diamond necklace with circular clusters of cushion-shaped diamonds, estimated at £25,000 – 30,000, are both outstanding examples of their type.
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A further highlight is an early 20th century emerald and diamond choker/ bracelet combination. Designed as a highly articulated series of panels of brilliant and single-cut diamonds with rectangular and calibré-cut emeralds, the choker separates to form a pair of bracelets. This fantastic piece is estimated at £10,000 – 15,000.
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A rare catalogue, published in 1839, of Henry Philip Hope’s collection of pearls and precious stones will also be offered in this sale estimated at £2,000-3,000.
