18kt yellow gold polished finish multi-band design twist detailing bezel-set cushion-cut blue prasiolite pavé-set round-cut diamonds totalling 0.24 to 0.30 carats (dependent on size) 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.