gold-tone 18K yellow gold vermeil 18 pear-cut laboratory-grown simulated white diamonds totalling 19.58 carats diamond-set star-shaped clasp all set in 18k gold vermeil 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. Unfortunately, the brand cannot accept returns of jewellery for piercings.