Square or Princess Shape

Facet Pattern
Princess cut stones have either 57 or 76 facets. With its pyramidal shape and bevelled shape, it creates the perfect conditions for light dispersion, making it a very popular choice for solitaire engagement rings and earrings. This also means that any internal inclusions can be hidden more effectively.
History
The Princess cut as we know it today is a modern design, devised in the 1970’s essentially as a modified brilliant diamond. Following several years of optical research, the modern Princess cut was created – a square stone of 57 facets arranged similarly to those of a round brilliant cut diamond.
