18kt white gold 18kt white gold Classic South Sea pearl and diamond earrings from YOKO LONDON featuring South Sea pearl, AA quality pearls, diamond and G/VS diamond colour and clarity. 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..