Halo rings has a setting that encircles a center Moissanite stone in a collection of smaller Moissanite stones. These stones flash with light and focus attention back on the center stone to create interest and draw focus. A high-carat main Moissanite stone looks substantial in a halo setting. And a quarter-, third- or half-carat Moissanite can look, by some estimates, as much as a half a carat larger.