Unique Moments 3/4 ct Round Lab Grown Diamond Solitaire Ring in 10K White Gold (J, SI-I1). Classic, simple perfection. The stunning round 3/4 ct. lab-grown diamond solitaire at the center of this 10K white gold engagement ring needs no accompaniment. The simple polished shank is a becoming detail. Expertly finished and ready to wear, this engagement ring proclaims your love.