Five of the most popular shapes for diamond pendants right now are round, princess, oval, pear, and marquise. Round diamond pendants provide the perfect way to add a touch of elegance and sparkle. Princess diamond pendants are cut in a square or rectangular shape. Oval diamond pendants are the epitome of elegance, with an elongated and tapered shape that seems to sparkle endlessly. Pear diamond pendants are a timeless and sophisticated pick for special occasions. Marquise diamond pendants offer an unmistakably chic and sophisticated look.