Sterling Silver 1.1ct Lab-Grown Moissanite Heart Halo Engagement Ring. This beautiful sterling silver heart engagement ring is the perfect selection for those who love all things hearts, featuring a heart-shaped lab-grown moissanite solitaire secured in a prong setting in the center, framed by round brilliant cut lab-grown moissanite in a heart-shaped halo and pave set on the band. Ring is adjustable in size, accommodating different ring sizes.