Diamond Symmetry


How precisely the various facets of a diamond align and intersect is responsible by symmetry. Extra or

The scale under consideration displays the symmetry grade as determined by the GIA

misshapen facets, off center culets and tables, and wavy girdles can be included to this.

A diamond with poor symmetry can reducing the diamond's brilliance.because it may misdirect light that travels into the diamond and send it off at slightly wrong angles, In order to prevent a defect often a diamond cutter allows a slight decrease in symmetry.


The scale under consideration displays the symmetry grade as determined by the GIA:


Excellent No symmetry defects visible at 10x magnification.
Very Good Any defects are extremely difficult to see at 10x magnification.
Good Any defects are difficult to see at 10x magnification.
Fair Defects are noticeable at 10x magnification, and may be visible to the naked eye.
Poor Defects are visible to the naked eye.


A symmetry grade of Excellent to Good: in this scale summetry is not a primary factor, because each of these grades is possible in diamonds of exceptional appearance.

It is more important in diamonds of VVS2 Clarity and higher. Very fine defects resulting from Fair or Poor symmetry (which may resemble point insertions) may jeopardize otherwise the impeccable appearance of a diamond.

Symmetry has a great influence on the price, although the appearance of its impact is insignificant.A diamond with Excellent Symmetry and Polish may be priced 10%-15% higher than a diamond with Good Symmetry and Polish. It is more depend on consumer's needs and tastes , not on actual effect on a diamond's appearance.

But summetry is not the only one standart for chosen the diamond. Symmetry (and polish) can then be used as a further refinement or tie breaker, when comparing two diamonds of equal Cut grade,