18kt black gold 18kt black gold Twilight Tahitian pearl and diamond earrings from YOKO LONDON featuring freshwater pearls, round cut diamonds, G/VS diamonds colour and clarity, lever fastening and for pierced ears. These earrings come as a pair.. Pearls should be the last thing that you put on in the morning and the first thing you take off at night. Avoid contact with perfumes or creams, and simply wipe with a soft cloth to clean..