18kt white gold Riviera diamond tennis necklace from KWIAT featuring 18kt white gold, polished finish, articulated links, claw/prong setting, round cut diamonds and GH/VS2-SI1 diamonds colour and clarity. Includes a GIA report. This certification from the Gemological Institute of America assesses diamonds' authenticity as well as cut, colour, clarity and carat weight.. 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..