A 3-carat princess-cut diamond is the epitome of bold and beautiful with its sharp corners and clean lines. The intense sparkle is one of the best things about this diamond shape, with its faceting style similar to round diamonds, making them brilliant. A 3-carat princess-cut diamond is going to be noticed whether you want it or not due to its larger size. A 3-carat princess-cut diamond is amazing for making a crisp statement that stands out in a crowd.