Choosing a diamond shape is one of the most exciting parts of designing an engagement ring. While carat weight, colour, and clarity are important, the shape is what gives a ring its personality.
In 2026, we're seeing a shift away from simply following trends and toward selecting shapes that reflect personal style, lifestyle, and individuality. While some classic favourites continue to dominate, other cuts are experiencing a major resurgence thanks to social media, celebrity engagement rings, and a growing appreciation for unique designs.
If you're searching for the perfect engagement ring, here's what you need to know about today's most popular diamond shapes.
Round: The Timeless Sparkle
The round brilliant diamond remains the most popular diamond shape in the world, and for good reason.
Designed with 58 facets, the round brilliant is engineered to maximise light return, creating unmatched sparkle and fire. It's the shape that never goes out of style and works beautifully in virtually every setting style.
Why Couples Love Round Diamonds
- Maximum brilliance and sparkle
- Timeless appeal
- Complements all ring styles
- Excellent resale value
- Never trend-dependent
2026 Trend Insight
While round diamonds remain a classic choice, we're seeing more couples pair them with wider bands, hidden halos, chunky gold settings, and modern bezel designs to create a fresh, contemporary look.
Oval: Elongated Elegance
If there is one shape that has dominated engagement ring trends over the past several years, it's the oval diamond.
Ovals create the illusion of greater size, elongate the finger, and offer exceptional brilliance. Their versatility allows them to work beautifully in both traditional and modern designs.
Why Couples Love Oval Diamonds
- Finger-flattering shape
- Appears larger than many other cuts of equal carat weight
- Strong brilliance
- Timeless yet contemporary
- Versatile design options
2026 Trend Insight
While hidden halo oval rings remain popular, we're seeing increased demand for east-west ovals, chunky cigar-band settings, and bezel-set oval engagement rings that feel more fashion-forward and unique.
Radiant: Bold Brilliance in Every Angle
Radiant cut diamonds continue to gain momentum in 2026.
Combining the elegant outline of an emerald cut with the sparkle of a round brilliant, radiant diamonds offer the best of both worlds. Their faceting creates incredible fire while maintaining a modern geometric appearance.
Why Couples Love Radiant Diamonds
- Exceptional sparkle
- Modern shape
- Strong durability due to clipped corners
- Appears larger than many square cuts
- Works beautifully in both solitaire and halo settings
2026 Trend Insight
Elongated radiant diamonds are among the fastest-growing engagement ring styles this year. They're frequently paired with thick gold bands, cathedral settings, and clean solitaire designs.
Emerald: Vintage Charm
The emerald cut has become one of the most sought-after shapes among those who appreciate understated luxury.
Unlike brilliant-cut diamonds, emerald cuts feature step-cut facets that create a sophisticated hall-of-mirrors effect. Rather than focusing on sparkle, they showcase clarity, elegance, and clean lines.
Why Couples Love Emerald Diamonds
- Elegant elongated appearance
- Timeless sophistication
- Vintage-inspired appeal
- Highlights diamond clarity
- Distinctive, refined look
2026 Trend Insight
Emerald cuts continue to dominate the luxury engagement ring market. Popular pairings include tapered baguettes, chunky yellow gold bands, bezel settings, and sleek east-west designs.
Marquise: Dramatic Elegance
For years, marquise diamonds flew under the radar. Today, they're making one of the biggest comebacks in fine jewellery.
Originally popularised by royalty, the marquise shape creates dramatic finger coverage and a striking silhouette that stands out from more traditional cuts.
Why Couples Love Marquise Diamonds
- Creates the illusion of a larger diamond
- Elongates the finger
- Distinctive and unique
- Vintage appeal with modern versatility
- Exceptional finger coverage
2026 Trend Insight
Marquise diamonds are experiencing a major revival. We are seeing them set north-south, east-west, half-bezel, and even paired with curved wedding bands for a highly contemporary bridal look.
Pear: Playful Sophistication
The pear-shaped diamond combines the brilliance of a round diamond with the elegance of a marquise.
Its unique teardrop silhouette offers a balance between classic and contemporary, making it an increasingly popular choice among modern brides.
Why Couples Love Pear Diamonds
- Distinctive shape
- Strong brilliance
- Creates a slimming effect on the finger
- Appears larger than many other shapes
- Versatile styling options
2026 Trend Insight
Pear diamonds are being styled in unexpected ways, including east-west settings, bezel designs, and asymmetrical ring layouts that feel modern and artistic.
Princess: Modern Geometry
The princess cut remains one of the most popular square-shaped diamonds available.
Known for its sharp corners and brilliant faceting, the princess cut offers exceptional sparkle while maintaining a clean, geometric appearance.
Why Couples Love Princess Diamonds
- Brilliant sparkle
- Contemporary appearance
- Strong value per carat
- Clean architectural lines
- Timeless versatility
2026 Trend Insight
While princess cuts aren't as dominant as they were in the early 2000s, they continue to attract buyers looking for something modern and structured. Bezel settings and wider bands are helping bring this classic shape into a new era.
Which Diamond Shape Is Right for You?
The most popular shape isn't necessarily the best shape. The right diamond is the one that reflects your style, personality, and lifestyle.
If you love timeless sparkle, a round brilliant may be perfect. If you prefer a modern elongated look, an oval or radiant could be ideal. If understated luxury speaks to you, an emerald cut might be the answer.
The best engagement rings in 2026 aren't about following trends. They're about creating something personal.
Final Thoughts
Diamond trends may evolve, but great design never goes out of style.
Whether you're drawn to a classic round brilliant, a bold radiant, a sophisticated emerald, or a trending marquise, choosing a shape you genuinely love will ensure your engagement ring remains meaningful for decades to come.
At Canadian Expert Jewellery, we help couples explore every diamond shape and design custom engagement rings that reflect their unique story, style, and vision.