You are likely to be more drawn to an engagement ring with a unique look like settings and cuts that appear one of a kind, whether it is a cluster, solitaire, or a three-stone setting. Besides, a rare engagement ring with a geometric gemstone, a shield-cut diamond, or a cluster of distinctively shaped stones will set it apart.   While a distinctively shaped diamond engagement ring is all about the extreme wow factor, it is not to say that each design requires a gemstone weighing upwards of 3 carats. That would be your goal, but an array of sizes from half a carat diamond and gems to 1 or 2-carat stones can be very striking in a unique cut. Shield cut and portrait diamonds, which are angular alternatives to pear and oval shapes, are flat but appear longer on one’s finger, which gives the impression of a larger gemstone, especially with side baguettes or pave halo settings. Besides, unusual diamond shapes such as a half-moon or teardrop are particularly versatile and exceptional – depending upon your budget, you can opt for a larger solitaire in one of these shapes. You can even select an emerald cut diamond ring with trapezoids to give it a slightly unconventional look.