Princess and Radiant Cuts The most noticeable feature that distinguishes the Princess from the Radiant Cut is that the Radiant has the corners cut off, creating an eight sided figure, whereas the Princess has sharp, pointed corners and is four sided. Although they appear similar they are technically two very different cuts. Both cuts come in square and rectangular (elongated) forms.A common misconception is that the Radiant is rectangular and the Princess is square Princess Radiant Table of Contents Encyclopedia Home Introduction The 4 C's Terminology Depth and Table Percentages How to use The Diamond Buying Guide GIA, AGS, & Commercial Grade Conversion Charts Round Brilliant , Brilliant, Old Mine Cut Pear and Oval Cuts Marquise Cut Heart Shape Princess and Radiant Cuts Emerald, Cushion, and Carre Cut Trillions   A 1:1 ratio is square and a 1.3:1 is considered rectangular. (See Table and Depth Percentage Formulas.) Approximate carat weight of an Princess or Radiant Cut diamond=Length x Width x Depth x 0.084 The above weight formula provides an estimate. The actual weight may vary up to 10%, depending on the make, girdle thickness, and accuracy of the measurement tools.