18kt yellow gold/sterling silver polished finish bezel setting blue topaz totalling 7.40 carats Please note that the chain pictured is not included with this item. 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. 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.