It’s Haute Couture Week in Paris and all the major jewellers are showing their new collections. At the Hótel de Crillon, in a heavily guarded rooftop suite, De Beers is unveiling its display with a difference. In one blink-and-you’ll-miss-it cabinet, which only VVIP clients are allowed to see, sits a rarer-than-rare 2 carat orange diamond, intensely tangerine-hued and flashing
