Shape vs. Cut: What Is the Difference?

Before diving into the different shapes, it is important to clarify a common point of confusion. "Cut" refers to how well a diamond has been polished to maximize brilliance (this is one of the 4 Cs). "Shape" refers to the physical geometry of the diamond—the silhouette you see when looking at it from above. Lab-grown diamonds are available in every shape that mined diamonds are.

Round Brilliant: The Timeless Classic

The round brilliant is the most popular diamond shape, accounting for the majority of all diamond sales. Its 57 or 58 facets are precisely angled to maximize light reflection and create exceptional brilliance and fire. If you are unsure what shape to choose, the round brilliant is always a safe, elegant choice.

Best for: Engagement rings, anyone who loves sparkle and tradition.

Princess Cut: Modern Elegance

The princess cut is the most popular fancy shape—a square cut with sharp corners and brilliant-cut facets that create a modern, geometric look. It tends to appear slightly smaller than a round diamond of the same carat weight but offers more surface area and a unique silhouette.

Best for: Modern engagement rings, side stones, anyone who loves a square shape with maximum sparkle.

Oval Cut: Romantic and Elongating

The oval cut is an elongated version of the round brilliant, offering the same exceptional brilliance in a more unique silhouette. Its shape is flattering on the hand, making fingers appear longer and slimmer. Ovals are also popular as center stones because they tend to look larger than their actual carat weight.

Best for: Engagement rings, anyone who wants something unique but not unusual, those who want a flattering silhouette.

Emerald Cut: Sophisticated and Understated

The emerald cut is a step-cut shape, meaning it uses long, flat facets that create a "hall of mirrors" effect rather than the intense sparkle of a brilliant cut. Its large, open table showcases the clarity of the diamond and gives it a sophisticated, Art Deco feel. It is a quieter kind of beauty.

Best for: Those who appreciate vintage glamour, larger diamonds where clarity matters, understated elegance.

Cushion Cut: Soft and Romantic

The cushion cut combines a square shape with rounded corners, resembling a pillow—which is where the name comes from. It has larger facets that enhance a diamond clarity and fire, producing a warm, romantic glow rather than the sharp brilliance of a round. Cushion cuts have surged in popularity in recent years.

Best for: Vintage lovers, romantic aesthetics, larger stones where the warm glow is desirable.

Pear Shape: Unique and Eye-Catching

The pear shape (or teardrop) is a hybrid of the round brilliant and marquise shapes. It has a rounded end on one side and a pointed end on the other, creating a distinctive and elegant silhouette. When set in an engagement ring, a pear shape is both classic and unconventional.

Best for: Statement pieces, unique engagement rings, those who want something distinctive yet refined.

Radiant Cut: Brilliance with Shape

The radiant cut is a rectangular or square shape with cropped corners and brilliant-cut facets throughout. It combines the geometric silhouette of an emerald cut with the sparkle of a round brilliant. It is a versatile shape that works well as a center stone or in three-stone settings.

Best for: Versatile jewelry designs, anyone who wants a geometric shape with maximum sparkle.

Choosing the Right Shape

When selecting a diamond shape, consider:

• Personal style: Classic and traditional, or modern and geometric?
• Hand shape: Elongated shapes (oval, pear, marquise) can make fingers look longer; rounded shapes complement wider fingers.
• Setting style: Some shapes pair better with certain settings. A round brilliant works with almost any setting; a princess cut needs a protective setting to shield its corners.
• Budget: Fancy shapes (oval, pear, princess) often cost slightly less per carat than round brilliants of equivalent quality, since less of the rough diamond is lost during cutting.

At Aranc, we carry lab-grown diamonds in all the most popular shapes. Explore our full collection to find the one that speaks to you.