Diamond Symmetry

Bottom Line Recommendation:

Diamond Symmetry Diagram

  • Symmetry: “Good” or better is fine.

What is Diamond Symmetry?

Diamond Symmetry refers to how well aligned the facets of a diamond are.  i.e., do the edges of the facets on the top and bottom of the diamond line up along the girdle?  Are the facets aligned symmetrically around the diamond?

Is Symmetry any more important than Polish?

The simple answer to that question is: not really.  Take a look at the diagram on the right.

Each of the problems mentioned there (off-center culet, off-center table, misshapen facets, out-of-round circumference, crown and pavilion misalignment, and a wavy girdle) can definitely take away from the beauty of a diamond. That’s not the issue.

Telling the Difference Between Symmetries 

The issue is that, I, the diamond expert with 6+ years of experience can hardly tell the difference between a diamond with “Good” symmetry and “Excellent” symmetry.

You will only see noticeable defects in symmetry as found in the diagram to the right in diamonds with a “Fair” or “Poor” symmetry grade.  So like Polish, there’s no need to spend any additional money to buy a diamond with a “Very Good” or “Excellent” symmetry grade.

Top Recommended Vendors
Blue Nile Blue Nile is the largest and most well known internet jewelry seller. They have the industry-leading largest available exclusive online inventory. Their high quality images are catching up to James Allens' and their prices are amazing.
What we love about them:
  • No questions asked returns within 30 days of shipment. Blue Nile will send you a paid shipping label to return the ring.
  • Lifetime Warranty
  • Free Shipping
  • Free prong tightening, repolishing, rhodium plating and cleaning every 6 months
  • Provide insurance appraisal
  • One free resizing within the first year of purchase
  • High quality images of about half of their diamonds
  • 24/7 Customer Service
  • 100% credit towards future upgrades (must be at least double in value)
  • Best in class fulfillment

James Allen James Allen is the leader in online diamond sales. Their imaging technology is at the point where it's almost the same as inspecting a diamond with a jeweler's loupe. Their customer experience is best in class, and they have recently upgraded their non-engagement jewelry inventory as well.
What we love about them:
  • No questions asked returns within 30 days of shipment. James Allen will send you a paid shipping label to return the ring.
  • Lifetime Warranty
  • Free International Shipping
  • Free prong tightening, repolishing, rhodium plating and cleaning every 6 months
  • Provide insurance appraisals
  • One free resizing within 60 days of purchase
  • Free ring inscriptions
  • Best-in-class high quality imagery of all diamonds in stock
  • 24/7 Customer Service
  • Best-in-class packaging

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