SHAPE: The shape of the diamond is what shape the diamond appears to have from the top. Each diamond is unique in its measurements: a round diamond might measure 6.5 x 6.55 mm, so while it appears round, it is very slightly off. The more "off round" it becomes, the lower the value. A square diamond might h

ave a ratio of 1.1, which means that one side is 1.1 times the length of the other side, such as a stone that measures 6.5mm x 7.15mm. The closer a princess, radiant, or Asscher diamond is to perfect "square," the greater the value. A princess and radiant cut diamond can also be "off square," or rectangular. This may work within certain design constraints, and be more conservatively priced. A radiant cut diamond is very similar to the princess, but it has cut corners. This makes it more versatile for design purposes, as there is a natural place for the prongs, and it also reduces the chance of chipping on the corners.