Proportions
Table, depth, crown and pavilion relationships influence how light interacts with a faceted diamond.
Diamond cut,
beyond the shape.
Shape describes outline. Cut quality describes how effectively a diamond has been fashioned, including proportions and finish that influence its visual performance.
Symmetry
Symmetry evaluates the precision and alignment of facets and the diamond's overall form.
Polish
Polish evaluates surface finish after cutting. Finish characteristics are recorded on many grading reports.
Do not confuse cut with shape.
A round diamond is a shape. Its cut grade, proportions, polish and symmetry describe different aspects of how that stone was fashioned. Review the grading report and the actual stone together.