Round Original Halo Ring1. 25 Carat Round Original Ring This 1 carat centered engagement ring features a classic halo over a basket cathedral setting and diamond lined band. Opt for a 1 carat natural diamond center or a 1 carat moissanite center both options come adorned with 0. 25 carats of natural side diamonds. Two types of wedding bands have been designed specifically for this engagement ring. One wraps the halo in a full contour (Contour Band) while the other stacks