18kt yellow gold polished finish 19.1 cm / 7.5 inch cable-link chain pavé-set round-cut sapphires totalling 0.4 carats clasp fastening 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. 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.