BACK TO BLACK Left / Dress, £2,062, Rochas, net-a-porter.com; Diamond and pearl earrings, £3,980, Noa Fine Jewellery, noafinejewellery.com Above / Dress, £1,269, DVF, 25 Bruton Street, W1J; Stilettos, POA, Dsquared2, as before; White gold and diamond earrings, £42,500, Amrapali, amrapalijewels.com; Black and white diamond ring, £3,390, NOA Fine Jewellery, as before