The length-to-width ratio of a fancy shape is its length divided by its width, both taken from the measurements.
In more detail
GIA's oval guide says that many people prefer ovals of 1.30 to 1.50. The ratio can't predict a bow-tie. Our DG-Bowtie and Marquise are both 2.06 to 1, and only DG-Bowtie has a band.
On a grading report
Not printed as a line: divide the length by the width from the measurements.
Related terms
- Measurements: Measurements is the report line that gives a stone's size in millimeters. A round reads minimum – maximum diameter × depth, and a fancy shape length × width × depth.
- Fancy shape: A fancy shape is any diamond outline other than round, such as oval, pear, marquise, cushion, princess or emerald.
- Bow-tie: A bow-tie is a dark band across the belly of an oval, pear, marquise or other elongated stone. It is not an inclusion or a color: the facets there send little light back to the viewer.
- Oval cut: An oval cut is an elongated round: the brilliant facet plan stretched along one axis.
- Marquise cut: A marquise cut is an elongated brilliant pointed at both ends.