When it comes right down to it, a round diamond solitaire engagement ring is the queen of them all. She's simple, classic, absolutely stunning in her brilliance, and the no-fuss option for folks who just want a diamond to stand on its own merit, without all the fluff. That said, round diamonds look fantastic in just about any setting style, whether it's a diamond halo that surrounds her in sparkle, some floral accents for the romantic in all of us, or a chunky bezel engagement ring that gives sculptural sophistication.