The Diamond Guide on Shapes: 3 Cut Categories to Help You Choose Diamond Shapes Easier

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A diamond shape is a face-on appearance of a precious stone. Many people consider it seriously while buying a diamond. Rightly so: the shape refers to obvious things like the physical form and geometrical parameters of a jewel. But how to know which one is better? The diamond guide of shapes is here to help.

Are there best and worst diamond shapes?

Technological progress made the cuts of diamonds more diverse and the diamond shapes more complex. That's how a brilliant cut diamond appeared. This precious stone is capable of reflecting the maximum light on its surface. Such cuts of diamond shapes are fiery and sparkling. That's why diamond experts highly recommend them to buy.

Being perfectly cut, all diamond shapes possess their own beauty and allure. Some of them are classic, while the others are fancy (like oval, heart, and princess shapes). The exact choice depends on your taste and the jewelry type wanted.

all diamonds shape

Do diamond shapes mean different cuts of diamonds?

Many people mistake shapes and cuts of diamonds, assuming they mean the same. But it's not accurate: a diamond cut defines the ability of a stone to reflect the light, while shapes of diamonds are the forms in which all this cutting and polishing results.

However, the mistake is so common that even professionals have started using the term 'diamond cut' to say 'the diamond shape'. Anyway, to give a diamond some physical appearance, you need to cut a stone first. This indulgence doesn't apply to the situation of calling 'a diamond cut' 'a diamond shape'. This is a severe mistake already.

3 main cuts of diamonds

There are 3 different cuts of diamonds that classify all the diamond shapes:

    • Round brilliant cut diamond. A classic and most popular cut on the diamond market. First, the stone is cut as a round diamond. Then, it can get other shapes or remain round-shaped. Examples: Round shape, Pear shape, Marquise cut, Oval shape, Heart shape.
    • Step diamond cut. Diamond shapes of this cutting style resemble the steps of a staircase. Examples: Asscher cut, Emerald cut.
    • Mixed diamond cut. Diamond shapes are a mix of classic and step-cut facets. Examples: Radiant shape, Cushion cut, Princess cut.


Before diving into the great number of diamond shapes available, select one of three cutting styles. Then, the choice of the exact diamond shape will become three times easier for you!

type of shape

Cut Category #1: Round brilliant cut diamond

Round diamond shape

Round diamond shape has the greatest popularity. It's easy to find around 75% of all the diamonds eligible for sale are round-shaped.

What makes this diamond shape special: Round shape has perfect proportions and turned into the standard for the diamond industry. People fancy Round brilliant cut diamonds for their outstanding brilliance, fire, and scintillation.

Recommendation from Diamond Registry jeweler: These classic shapes of diamonds are universal and fit any jewelry type.

Pear diamond shape

In the line of different cuts of diamonds, a pear shape is a fancy form. This diamond is clear as a teardrop and has a hypnotic effect that allows nobody to stay indifferent.

What makes this diamond shape special: In terms of cutting, this diamond shape is an alternative to a Round brilliant cut diamond. It unites in its form Oval cut and Marquise cut. Pear diamond is outstandingly sparkling and has a perfect symmetry.

Recommendation from Diamond Registry jeweler: Pear diamonds look great in pendants and earrings.

Marquise diamond shape

In the variety of diamond shapes, Marquise cut is the most impressive choice. It has a curved middle part and sharpened ends. The form is very interesting and fires the imagination.

What makes this diamond shape special: The unique structure of this stone is good for masking the small carat weight. It makes a diamond look bigger as it is with its elegant tapering points on both sides.

Recommendation from Diamond Registry jeweler: Marquise cut suits various ring shapes, making a finger elongated.

Oval diamond shape

Different diamond cuts are claimed to be Oval, but the true Oval shape is perfectly symmetrical. If it's made right, a diamond becomes fiery and exceptional.

What makes this diamond shape special: With this diamond cut, diamond shapes have a perfect brilliance of a Round diamond. The only difference between these shapes of diamonds is in the elliptical form of Oval shape. Thanks to this, the diamond appears larger and makes fingers elongated.

Recommendation from Diamond Registry jeweler: Oval shape is always a good idea because it fits any ring shapes.

Heart diamond shape

Different cuts of diamonds can create a love stone, but heart-shaped diamonds intensify this message a hundred times.

What makes this diamond shape special: This shape is rare because it requires flawless cuts of diamonds. It's really hard to make a perfect heart diamond only a professional can work with a Round brilliant cut diamond this way.

Recommendation from Diamond Registry jeweler: Heart-shaped cuts of diamonds are the universal symbol of love when featured in an engagement ring. To get the best of this cutting, go for the time-proved Claddagh design.


Cut Category #2: Step-cut diamond shapes

Asscher diamond shape

Step-cut diamond shapes were invented in 1902 and became loved instantly for their majesty and sophistication. Asscher stones have an octagon form with 74 facets.

What makes this diamond shape special: Among all the step-style cuts of diamonds, this diamond shape generates the most brilliance.

Recommendation from Diamond Registry jeweler: Asscher is a great choice for a solitaire setting and vintage jewelry.

Emerald diamond shape

Emerald cut is fancy and can come in various types of shapes, including a rectangular or square diamond. They have less fire than a Round brilliant cut diamond but create longer flashes of light.

What makes this diamond shape special: Choosing a perfect clarity grade is critical for Emerald-cut jewels. This diamond shape makes all the inclusions and flaws more visible than usual. Moreover, the reflective facets intensify the color grade so, you must be careful here too.

Recommendation from Diamond Registry expert: Choose Emerald shape for a stone of perfect clarity and color grades. Also, don't let the jeweler experiment with different cuts of diamonds on it. Only perfect parameters work for Emerald shape.


Cut Category #3: Mixed-cut diamond shapes

Radiant diamond shape

In the family of mixed diamond shapes, Radiant is the easiest form to distinguish, thanks to its cut corners.

What makes this diamond shape special: It combines the advantages of Round and Emerald cuts of diamonds, saving the brilliance of the first and the elegance of the latter. The cutter creates a customized facet pattern on the crown and pavilion that intensifies dazzling brilliance.

Recommendation from Diamond Registry jeweler: This diamond shape reveals its best in a diamond of great carat size.

Cushion diamond shape

This cut has large facets and round corners. Many people call it "a pillow diamond" because of its square form and fiery appearance.

What makes this diamond shape special: A Cushion diamond shape is a combination of square and round outlines. This unique fancy cut evokes romantic feelings.

Recommendation from Diamond Registry jeweler: This shape looks great in any setting. It is perfect for diamond engagement rings, being called a ‘candlelight diamond'. 

Princess diamond shape

This square diamond appeared as an independent cut only recently. Nevertheless, it has become a hit pretty fast: now, the princess shape is the second popular form in the world.

What makes this diamond shape special: The faceting style of this square diamond is similar to a round brilliant diamond cut, but with triangular- and kite-shaped edges radiating from the center.

Recommendation from Diamond Registry jeweler: Princess diamond makes every woman feel special and unique just like a princess. A perfect choice for an engagement ring!