
An extremely rare fancy deep-blue diamond weighing 5.30 carats has been sold for record £6.2 million ($9.49 million) at Bonham’s Fine Jewellery sale in London five days ago. “Trombino” ring, favoured by Hollywood film stars, and the epitome of fashion and innovation during the 1960s was bought by Graff Diamond, an international diamond house based [...]


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