18kt yellow gold and silver diamond necklace from ROSA MARIA featuring 18kt yellow gold, oxidised sterling silver, cable-link chain, brushed finish, circular pendant, pavé setting, brown diamond and lobster claw fastening. All products are handcrafted.. 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..