There are multiple ways to accent a plain or diamond engagement ring, and below are a few of the trendiest ones.         Side Clusters Bringing together accent stones on either side of the center diamond is almost always a good idea. What results is a beautiful three-stone design, with the accent stones taking up more space as a cluster than when set in a row. This is a new take on the classic design. Classic & Durable Ever tried setting the center stone over an integrated trellis and held in place by six prongs? The accent stones can be set inside a channel so they are safe from even major knocks. It is an elegant style to be sure, and one guaranteed to last. Delicate Metalwork Using a lace-inspired or scalloped band makes engagement ring look more delicate. This style uses alternating oblong and round shapes, with accent stones set in them, along with some fine milgrain on the edge of the band.