silver-tone 18K white gold yellow natural diamond emerald-cut yellow natural diamond round brilliant cut white natural diamonds halo setting double halo design 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 and carat weight.