|Derived from vintage rings, halo engagement rings are one of the most popular setting styles at Ritani. One of the most famous halo engagement rings of all time is Kate Middleton's engagement ring, a blue oval-shaped sapphire with a diamond halo. Currently, oval halo engagement rings are trending. Halo engagement ring settings are a great way to add more sparkle to your emerald-cut or Asscher-cut diamond. These diamond shapes don't sparkle much, so a diamond halo will add extra radiance. For extra sparkle, choose a double halo engagement ring. Need help choosing the perfect halo engagement ring? Chat now with our Diamond Concierge team.