Precursors of the princess cut include the Barion created by South African cutter Basit Watermeyer and the Quadrillion – a similar cut with only 49 facets. After several years of optical research, the modern Princess cut was created in the form of a square stone made up of 58 facets.
The square version of the round brilliant cut, The Princess cut is usually made up of 57 or 76 facets with a general ratio of 1.0 to 1.05. Its four bevelled sides resulting from its pyramidal shape disperses more light than any other square shaped diamond. This makes it a popular choice for both solitaire engagement rings and earrings.