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Diamond Shape: Find Your Perfect Diamond Ring Shape

What Diamond Shape is Right for You?

The shape of a diamond has a lot of influence over the feel of an engagement ring, and for the best aesthetic, the lines of the diamond shape should reflect the engagement ring shape or vice versa. 

The Most Popular Diamond Shapes

Round diamonds are the traditional choice for engagement rings and remain the most popular. Next in popularity to the round diamond shape are the cushion and the oval cut diamonds. Historically, the princess diamond ring shape was the second most popular diamond; however, the cushion and oval cut diamonds have taken the lead in the last decade.

Round diamond shape
A round diamond is cut to perfect
mathematical specs to return the most light to your eyes, and so it appears the most sparkly.

The round diamond shape is versatile in many engagement ring shapes and designs.
Elongated Cushion Cut Diamond
The cushion-cut diamond can have a square ratio, or it can be rectangular. 

A cushion-cut diamond is a soft and unique shape that lends itself well to a gorgeous halo design for engagement ring shapes.
oval diamond shape for engagement rings
The oval diamond is more popular in vintage engagement ring styles.

An oval cut is a popular choice for three-stone rings as well, as you can still squeeze in two diamonds on either side for a big look.

Diamond Shape Chart

Diamond Shape Chart For Engagement Rings

The Princess Cut Diamondfiremark princess cut diamonds

The princess cut diamond is a square, and that hard-edged geometric diamond shape lends itself to more modern designs. The best setting for this engagement ring shape is a v-tip prong, which protects the corners and securely holds the stone.  

If you love square-shaped diamonds, the Firemark Princess Cut is for you! With precision faceting, this diamond cut is the most sparkly of princesses.

Diamond Proportions or "Ratio"

Marquise diamond shapeEach diamond is unique in its measurements: a round diamond might measure 6.5 x 6.55 mm, so while it appears round, it is very slightly off. The more "off round" it becomes, the lower the value. A square diamond might have a ratio of 1.1, which means that one side is 1.1 times the length of the other side, such as a stone that measures 6.5mm x 7.15mm.

The closer a princess, radiant, or Asscher diamond is to a perfect "square," the greater the value. A princess, cushion, and radiant cut diamond can also be "off square" or rectangular. This may work within certain design constraints and be more conservatively priced. A radiant cut diamond is very similar to the princess, but it has cut corners. This makes it more versatile for design purposes, as there is a natural place for the prongs, and it also reduces the chance of chipping on the corners for wedding ring shapes.

Other elongated diamonds like pears and marquise can be long and skinny or shorter and wider.  The ratio changes the look of the stone!

Kite Set Diamond ShapesKite set princess cut diamond

If you are thinking of setting a princess cut, cushion cut, radiant, or Asscher cut diamond on an angle, also called "kite-set," it is important to have a nearly perfect square, as when it is on a diagonal, the off square cut is very noticeable in an engagement ring shape.


Wedding Band Shape

The shape of a diamond may also influence the shape of the wedding band.  A wide oval or rectangular cushion may require the wedding band to curve, or contour, around the engagement ring.


What Diamond Shape is Right for Your Engagement Ring?

When selecting the perfect diamond ring shape for your engagement or wedding, understanding the nuances of each shape can greatly influence your decision. The round diamond remains a timeless choice, but other shapes like the princess, cushion, and radiant offer unique aesthetics and sparkles. The choice of diamond shape not only reflects your personal style but can also enhance the overall appearance of the ring. Whether you prefer the classic round or the geometric appeal of the princess, every diamond shape has a story to tell.


What Diamond Shape Are You?

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