IE Element 1

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Round

Round Diamonds have only 1 ratio due to their symmetrical shape

Princess

Emerald

Asscher

Marquis

Oval

Radiant

Pear

Heart

Cushion

Diamonds come in many shapes, each with their own unique charm.

Diamond Shape

How Does Ratio

Affect Shape?

All diamond shapes, except round, have ideal length-to-width ratios that emphasize their unique characteristics.

The Blue Nile

Signature Difference

If you’re looking for the best of the best, check out the Blue Nile Signature collection—our finest, most brilliant diamonds, cut to our exacting specifications.

In Summary

• Shape refers to a diamond’s visual outline when viewed from above. Choosing a diamond shape is purely a reflection of personal style rather than criteria like the 4Cs.

• Blue Nile carries 10 shapes, all of which have their own particular charm. Round-cut is the most popular shape, with princess a close second, however all fancy shapes are an excellent value, so you can often get a larger sized diamond while staying within your budget.

• Keep in mind that while a J-colored diamond is an excellent value, non-round (or fancy shapes) may have slight color in its corners, which is nearly imperceptible to the human eye.

Round

Princess

What Shapes are

Others Choosing?

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The round cut is a perennial favorite and loved for all 58 facets (57 if not counting the culet at the bottom) that provide its brilliance and sparkle. This shape is also available in our Blue Nile Signature collection.

Round

This popular choice is traditionally square, but brilliant like the round-cut and a stellar choice for engagement rings. This shape is also available in our Blue Nile Signature Collection.

Princess

Clarity, rather than brilliance, is key with this elegant rectangular shape so review the clarity plot on the diamond certificate to see where the inclusions lie. This shape is also available in our Blue Nile Signature Collection.

Emerald

Named after a family of Dutch diamond-cutters, this shape is a square emerald-cut, so be sure to view the clarity plot on the diamond certificate to see where the inclusions lie. This shape is also available in our Blue Nile Signature Collection.

Asscher

A marquise (say mahr-keez) diamond is shaped like a football and looks great accented with round or pear-shaped side stones or as a solitaire. Its elongated shape maximizes carat weight, giving the illusion of a much larger diamond.

Marquise

Developed in the 1960s, the bright and lively oval shape is basically an elongated round-cut. Like the marquise, it carries carat its weight well, giving the appearance of a larger diamond.

Oval

Brilliant like a princess, yet often rectangular like an emerald-cut, this versatile shape distinguishes itself with trimmed, or flat, corners and looks beautiful in a setting with baguette or round side diamonds.

Radiant

This brilliant-cut diamond is shaped like a teardrop, with a rounded end tapering into a single point. First developed in Belgium in 1453, the pear shape feature long triangular shaped facets and is an excellent alternative to a round-cut in a solitaire setting.

Pear

The ultimate symbol of love since the Middle Ages, a heart-cut is simply a pear-cut with a notch at its top. A bold and distinctive choice for an engagement ring, it works well with a variety of other jewelry styles, including pendants and earrings.

Heart

Cushion- or pillow-cut diamonds range in shape from square to rectangular, but what makes this cut unique are its rounded corners and larger facets, which increase brilliance and highlight clarity. This shape is also available in our Blue Nile Signature Collection.

Cushion