18kt yellow gold tourmaline and diamond necklace18kt recycled gold delicate chain bezel setting pink tourmaline pav setting white diamonds F VS diamond colour and clarity 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. Includes a GIA report. This certification from the Gemological Institute of America assesses diamonds' authenticity as well as cut, colour, clarity