The princess cut is a brilliant-style shape with sharp, pointed, uncut corners. It is typically square in appearance (length-to-width ratio 1.05 or less), rather than rectangular.
Brilliant style refers to vertical-direction crown and pavilion facets instead of the older, step-style horizontal-direction facets. It is a straight-edged square with pavilion facets that are wide at the culet (bottom of the diamond) and narrowed toward the girdle, the opposite of the pavilion-facet arrangement on the cut-cornered radiant.
It may have either 50 facets (21 crown, 4 girdle, 25 pavilion) or 58 facets (21 crown, 4 girdle, 33 pavilion), depending on how the pavilion is cut.
The princess is the standard brilliant-style square cut found in both channel and invisibly set diamond jewelry using stones 0.25 carats or fewer. It has replaced traditional rounds in many cases.
The princess cut is a brilliant-style shape with sharp, pointed, uncut corners. It is typically square in appearance (length-to-width ratio 1.05 or less), rather than rectangular.