gold-tone 18K yellow gold wave design twisted rope pattern high polish finish oval shaped 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. Hallmarked in the United Kingdom at the London Assay Office. To ensure the shine and polish of your David Yurman piece, wash with a little non-bleach, soapy water and wipe clean with a soft cloth.