Oval Moissanite Halo Stud Earrings Sterling SilverThe halo setting is one of the most effective designs in jewelry a ring of smaller stones surrounding a center stone makes the whole piece appear larger and more luminous than a single solitaire of the same size. On an oval moissanite center stone, the effect is particularly striking. The elongated oval shape maximizes the surface area for light to enter and reflect, and moissanite's refractive index higher than diamond's means it disperses that light