2 ct Round Diamond in Octagon Halo Click to Watch Here is a 2 carat round diamond set in a seamless octagon shaped double sided halo. As with all of our custom designs, this engagement ring is crafted by hand and to the exact dimensions of the center-stone for a seamless fit and transforming a circle into an octagon. Notice the pave u-stem attachment underneath for the final splash of detail.To see more videos go to our Video Gallery Page here