London’s diamond trade may not be forever

Richard Orange says London’s traditional dominance of global dealing in uncut stones is under threat from new players based in India, China and Dubai

‘How does it feel to hold $9 million in the palm of your hand?’ One of the world’s leading diamond buyers, Rajiv Mehta, watches intently for my reaction to this question: the sachet of dull glassy pebbles I am gently weighing, if I could somehow get them out of this building and into the hands of some Antwerp middleman, would buy me one of London’s most prestigious addresses, my own island in the Bahamas, or a country-sized...