gold 18k yellow gold south sea pearl diamonds pearl pendant cabel-link chain pavé setting 179 white diamonds totalling 1.00 carat Normal everyday use and external agents may reduce the lustre of gemstones and gold surfaces. To maintain, use specific, non-abrasive products specially meant for cleaning jewellery. 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.