Diamond Symmetry (Excellent, Very Good, Good, Fair, Poor )
In nature, symmetry is associated with beauty. Even in human faces, symmetry is a desired feature. The same is true for Diamonds. A diamond that is cut and shaped symmetrically is more valuable and considered to be more beautiful.
To the unaided eye, diamond symmetry may not be immediately visible. Ideally, a diamond would have perfect alignment of the crown of the diamond, or its top, and the bottom, or its pavilion. If a diamond isn't cut symmetrically, then its facets won't reflect light as well, and it won't look as brilliant or as sparkling.
A diamond with excellent symmetry is cut perfectly. The facets on the Diamonds will shine as brightly as possible, maximizing the appeal of the diamond. In descending order of symmetry, Diamonds can also be very good, good, fair or poor.