Just her sophisticated style, this lab-grown diamond engagement ring shines. 18k yellow gold with 18k white gold 3-carat round-cut lab-grown diamond centerpiece round-cut lab-grown diamonds line the three sides of the shank total lab-grown diamond weight is 3 5/8 carats the independently certified center lab-grown diamond is laser-inscribed with a unique gemscribe® serial number to ensure your peace of mind a signature element of lab-grown diamonds and milgrain detailing encircles the band, symbolizing unity and eternal love from the monique lhuillier bliss collection, available exclusively at kay this ring is available in limited sizes; if you don't see your size here, please visit a store to order your ring