SUPER NATURAL

Around two years ago, in the high-flying heyday of travel pre-Covid-19, Jacqueline Karachi-Langane, the French creative director of Cartier fine jewellery, was doing her usual rounds at the Tucson gem show in Arizona. At one stand, a dazzling 4.01-carat rose-cut diamond caught her eye, and she hesitated but moved on. “I thought it was interesting, but it needed something else,” Karachi-Langane recounts when we meet. The next day, that diamond was still lingering in her thoughts while she was on the lookout for coloured gemstones, and there, at the same