Diamond Shapes Explained: Which Cut Is Right for Your Engagement Ring?

A diamond’s shape is the first thing anyone notices about an engagement ring — before carat,
before color, before the setting. It defines the ring’s entire personality. Here is an expert guide to
the ten classic diamond shapes, including how each one sparkles, how large it appears, and what it
costs relative to the others.
Round Brilliant: The Sparkle Champion

The round brilliant is the most popular diamond shape in the world, accounting for the majority of
engagement rings sold. Its 57–58 facets are mathematically engineered to return the maximum
possible light, which is why nothing outsparkles a well-cut round. The trade-off: rounds command
the highest price per carat of any shape, typically 20–35% more than fancy shapes of equal weight.
Choose a round if brilliance is your top priority and your style is timeless.
Oval: Elegant and Larger-Looking
The oval has surged in popularity over the past few years — and for good reason. Its elongated
silhouette appears up to 15% larger than a round of the same carat weight, and it flatters the finger
by making it look longer and slimmer. Ovals deliver brilliance close to a round at a noticeably lower
price. One thing to check: the "bow-tie" effect, a dark band across the center of poorly proportioned
ovals. Viewing the stone in person is the only reliable way to judge it.
Cushion: Romantic and Vintage-Inspired
With softly rounded corners and a pillowy outline, the cushion cut blends antique charm with
modern fire — it disperses light into flashes of color more than almost any other shape. Cushions
pair beautifully with halo settings and typically cost 25–30% less per carat than rounds.
Emerald: Understated Sophistication
The emerald cut is not about sparkle — it is about elegance. Its long, step-cut facets create dramatic
flashes of light called the "hall of mirrors" effect. Because the open table showcases the diamond’s
interior, clarity matters more here than in any other shape; look for VS2 or better. The emerald cut
is the choice of someone with quiet, confident taste.
Pear, Marquise and Heart: The Statement Shapes
• Pear — A teardrop silhouette combining the brilliance of a round with an elongating point.
Distinctive and increasingly popular.
• Marquise — The largest-looking shape per carat — its elongated form maximizes visible size
and dramatically lengthens the finger.
• Heart — The ultimate romantic symbol. Requires expert cutting for perfect symmetry, so buy
only from a jeweller who hand-selects their stones.
Princess, Radiant and Asscher: The Geometric Family
• Princess — A sharp, contemporary square with brilliance approaching a round at a
significantly lower price. A favorite for modern minimalists.
• Radiant — Combines the emerald cut’s trimmed-corner outline with brilliant-style faceting
— the best of both worlds: geometry plus fire.
• Asscher — A square step-cut with an almost Art Deco character. Like the emerald cut, it
rewards high clarity grades.

Which Shape Offers the Best Value?
If maximizing visible size per dollar is the goal, elongated fancy shapes — oval, marquise, pear and
radiant — consistently deliver the most "look" per carat. Rounds cost the most but sparkle the
most. Step cuts (emerald, Asscher) cost less per carat but require higher clarity, which offsets some
savings. The best approach: pick two or three shapes you love, then compare real stones side by
side.
Frequently Asked Questions
What is the most popular diamond shape for engagement rings?
Round brilliant remains the most popular shape worldwide, followed by oval, which has grown
rapidly in recent years. Cushion and emerald cuts round out the top four.
Which diamond shape looks the biggest?
Elongated shapes — marquise, oval and pear — appear largest for their carat weight because more
of the stone’s surface area faces up.
Is diamond shape the same as diamond cut?
Not exactly. Shape refers to the outline (round, oval, pear), while cut refers to the quality of the
faceting and proportions. A diamond of any shape can have an excellent or poor cut — and cut
quality is what determines sparkle.
Explore every diamond shape in person at TG Jewellers, Vancouver — or browse our full natural
and lab-grown diamond inventory by shape at tgjewellers.com.