18kt yellow gold encircling design pavé setting rose cut diamonds round brilliant cut diamonds rough hand-hammered brown diamonds G/VS diamonds colour and clarity signature technique of serti poinçon clasp fastening polished finish 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. A De Beers Jewellers Certificate of Authenticity accompanies all jewellery purchases. This certificate guarantees the authenticity of your De Beers Jewellers diamond jewellery; the finest quality materials and utmost care were used to craft this item to ensure its brilliance.