Reading Diamond Certs :: Symmetry

Symmetry is one of two aspects of the Finish of a diamond ::

  1. Symmetry
  2. Polish

We consider¬†Symmetry very important in the making of a beautiful diamond. Poor facet alignment will allow light to leak out before it reflects back to your eye — resulting in less brilliance and fire.

Without symmetry, the facets will not line up at the best angles and matching for maximum light performance.

In fancy shaped diamonds, such as a heart shape, poor symmetry may cause one side to be broader than the other and give it a lop-sided appearance, or result in uneven facet arrangements, both of which can also allow light to leak.



Grades for symmetry range from::

  • Ideal (which is very rare)
  • Excellent
  • Very Good
  • Good
  • Poor
  • Fair

We consider Good symmetry to be the minimum for a diamond used for an engagement ring.

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