Ideal Cut Diamonds

Representing only the top 3% of all diamonds, Ideal-cut diamonds dazzle with brilliance. This pinnacle of cut quality reflects most of the light that enters the diamond, radiating back a sparkle that will enhance any piece of jewellery. Shop our entire selection of Ideal-cut diamonds to find a traditional round diamond that makes a statement or a fancy-cut diamond with an effervescent personality.


24 of 87.301 Ideal Cut Diamonds

FAQs about Ideal Cut Diamonds

The cut grade is one of the 4Cs that determine the quality and pricing of a loose diamond. The cut grade refers to the facet proportions of the diamond. These proportions affect how light reflects in the diamond to create brilliance.

There are five different cut grades of diamonds, including Poor/Fair, Good, Very Good, Ideal, and Astor by Blue Nile™. However, you'll never find a Poor/Fair cut grade diamond sold at Blue Nile.

Yes. When it comes to round brilliant diamonds, the GIA uses the term "Excellent" for its highest cut grade. Blue Nile uses the term "Ideal" in exchange for the term "Excellent," but they are of the same cut quality.

Light reflects differently in every diamond. Light performance is measured by the GemEx BrillianceScope® Analyzer with spectrophotometer technology. Astor by Blue Nile™ diamonds are tested in this way.

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