A 5.03-carat, VS1 clarity fancy pink diamond sold for £2.23 million ($2.94 million) at Bonhams London Fine Jewellery on September 26. The sale set an auction world record price with a $583,551 per carat price, overtaking the previous fancy pink per-carat record of $528,021 set at the Sotheby’s Geneva auction in May 2016.
Bonhams UK Director of Jewellery Emily Barber noted, “This was due to a number of factors — its size (it’s exceptionally rare to see a pink over five carats on the market today), its even colour saturation and its extraordinarily elegant cut.”
The overall sale total was £6.94 million ($9.06 million), with 89 per cent lots sold by value.
A fancy-coloured diamond three-stone ring circa 1910, also sold at the auction for £168,750 ($220,526) against its pre-sale estimate of £80,000-£120,000 ($104,546-$156,838). This featured an old brilliant-cut fancy blue 0.95-carat diamond set between fancy yellow-orange marquise-cut diamonds, weighing 0.51 and 0.56 carats.
White diamonds had a strong showing at the sale, with a 9.18-carat Asscher-cut, H colour, VVS2 clarity diamond set in a ring going for £200,000 ($261,440), far exceeding its pre-sale estimate of £120,000-£150,000 ($156,838-$196,060).
Coloured gemstones also did well. An emerald and diamond necklace, bracelet, earring and ring suite by Chatila, sold for £656,750 ($858,436) against its pre-sale estimate of £200,000-£300,000 ($261,440-$392,174). A ruby and diamond ring by Bulgari, featuring a 3.28-carat ruby of Burmese origin, with no indication of heating, sold for £242,750 ($319,701). This translates to $97,469 per carat price.
An art deco sapphire and diamond ring by Tiffany & Co, circa 1920, featured a Sri Lankan sapphire weighing 11.09 carats, with no indication of heating. It sold for £150,000, ($197,550 or $17,813 per carat), exceeding its estimate of £60,000-£80,000 ($78,431-$104,546). An antique emerald and diamond ring, featuring a cushion-shaped Colombian emerald weighing 12.81 carats, with oiling, sold for £236,750 ($311,799, or $24,340 per carat), outstripping its estimate of £80,000-£120,000 ($104,546-$156,838).
An art deco diamond rivière by Cartier, circa 1930, weighing a total of approximately 60 carats, sold for £320,750 ($419,228), exceeding its pre-sale estimate of £200,000-£300,000 ($261,440-$392,174).
A belle époque diamond 'meander' tiara, designed by Spanish royal jeweller Ansorena, was owned by Spanish noblewoman Esperanza Chávarri Aldecoa, Countess of Villagonzalo, went under the hammer for £162,500 ($212,389), exceeding its pre-sale estimate of £80,000-£120,000 ($104,546-$156,838), selling to an Asian private collector.