18kt yellow gold 18kt yellow gold Trend freshwater pearl and diamond earrings from YOKO LONDON featuring freshwater pearls, AA quality pearls, round cut diamonds, G/VS diamonds colour and clarity and drop design. These earrings come as a pair.. This piece comes with a certificate of authenticity.. 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..