Sterling Silver 1ct Princess Lab-Grown Moissanite Cushion Halo Necklace. This brightly polished sterling silver necklace features a cushion cut lab-grown moissanite in the center of a halo with sparkling round brilliant cut lab-grown moissanite, giving the pendant a breathtaking design. This beautiful drop pendant suspends from a tapered bail with a rolo link chain threaded through it. A secure clasp keeps this exquisite necklace in place.