Natural Fancy Black Diamonds, These stunning Diamonds are available in a variety of different sizes and shapes. There are numerous shapes like the Round Brilliant Cut, Princess, Oval, Pear, Heart, Trillian, Triangle, and Marquise Shape. Some have rounded edges, others have sharp corners, and there are shapes that are vastly common, and others that are rare and unusual. Some shapes are well-known for their geometrical or symmetrical properties. And others are loved because they exhibits extra sparkle.