This sweet and meaningful lock-shaped heart necklace from the unstoppable love collection lets her know your love will shine on forever. 10k white gold at the center, a round-cut diamond continuously catches the light and sparkles from every angle, just like your love round-cut diamonds adorn the heart-shaped frame, lock loop and bail total diamond weight is 1/2 carat 17- to 19-inch adjustable curb chain with lobster clasp