Diamond Symmetry: The Finer Touches That Make A Difference.

The criteria for grading the symmetry of a diamond have remained the same since GIA introduced its grading system in the 1950ís. The symmetry refers to the finish that is done after cutting the diamond.

Generally the symmetry of a diamond donít make a much difference as the diamond cut; however, these finer characteristics of a diamond can either add to or deduct from the cost of a diamond.

Symmetry Grading

Diamond Symmetry

Symmetry refers to how well-proportioned the cut of the stone is. For instance, round diamonds should have symmetry and balance to attract the most amount of light for maximum fire and brilliance.

Price differences of diamond when symmetry gradient are taken into account.

Price difference for Round diamonds
1-1.49ct, F-H, VS1-SI2, GIA and AGS
58%-63% Depth, 53%-58% Table †
Data for April, 2004
Polish & Symmetry % Price difference
Ex/Ex or Id/Id 0%
Ex/VG or Id/VG -6.5%
VG/VG -8.3%
VG/G -9.8%
G/G -11.6%

* from pricescope.com