Splurge on Skin Celestial Black Diamond Cream. It uses rare diamond dust particles that penetrate deeper layers of your skin to get right to the root of anti-ageing. The cream should be applied before bedtime and will visibly improve the appearance of lines and wrinkles. Treat yourself – every girl deserves diamonds! Info: Dhs3,320, available at Harrods, +44 207 730 1234. .