18K yellow gold black enamel yellow diamonds lobster claw fastening 25 bezel-set cushion-cut yellow diamonds totalling 20.06 carats 142 pavé-set round-cut Y/Z IF-SI diamonds totalling 1.09 carats 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.