Bonhams London Fine Jewellery sale in September will be headlined by a 4.03-carat fancy intense blue diamond. The pear-shape diamond, Gem Konnect report, has a pre-sale estimate of £1.2-£1.5 million ($1.54-$1.9 million).
The second headline is a diamond brooch with a central square step-cut 4.83-carat fancy grey-blue diamond, featuring a fancy dark brown-greenish yellow step-cut diamond to either side of 2.51 carats and 2.38 carats respectively. These suspend a pear-shape fancy pink diamond drop below, weighing 1.9 carats. The brooch has a pre-sale estimate of £650,000-£850,000 ($836,390-$1.1 million).
The sale will include 188 lots of “white and coloured diamonds, sapphires from Kashmir, Burma and Sri Lanka, signed jewellery from Cartier and Van Cleef & Arpels, and the largest private collection of jewellery ever to come to auction by Anglo-Italian designer Andrew Grima”
