The halo setting refers to the placement of diamonds or other gemstones in a concentric circle or square around a center stone. The halo setting makes the center stone appear largera great option to boost the appearance of a small diamondand it increases the overall sparkle of the ring. A halo setting, then, can be a way to save money on a smaller-carat diamond while not sacrificing the overall appearance of the ring. In addition, adding a halo of colored gemstones or setting the halo diamonds with a different color metal can make for a contrast in colors. Halos are …