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In 2026, the most sought-after shapes for lab-grown diamond engagement rings are: oval, marquise, radiant, emerald, and cushion. Each has its own distinct personality and unique advantages.
Oval Diamond – Timeless Elegance
The oval diamond continues to be the most popular choice for engagement rings. Its elongated shape creates the illusion of a larger stone and provides a visual effect of slimming the fingers.
Advantages of the oval diamond
Appears larger than other shapes of the same carat
Maximizes brilliance
Optical lengthens the finger
Elegant and feminine appearance
Extremely versatile
Who is it for?
People who want a sophisticated, modern and very popular ring.
Marquise Diamond – The Royal Choice
The marquise shape has royal origins and is one of the most spectacular choices for an engagement ring.
The pointed ends and elongated silhouette create the impression of a diamond much larger than its actual carat.
Advantages of the marquise diamond
Impressive visual surface
Unique and exclusive appearance
Elongates the finger
Very rare compared to the oval
Who is it suitable for?
People looking for a different and memorable engagement ring.
Radiant Diamond – Maximum Shine
The radiant diamond combines the elegant shape of an emerald with the extraordinary brilliance of a round diamond.
It is one of the most appreciated cuts for those who want maximum fire and sparkle.
Advantages of the radiant diamond
Exceptional brilliance
Hides inclusions very well
Modern appearance
Suitable for solitaire or halo designs
Who is it suitable for?
People who love very shiny diamonds.
Emerald Diamond – Luxury and Refinement
The emerald diamond is considered one of the most elegant and sophisticated shapes in existence.
Its stepped cut offers a spectacular mirror effect and emphasizes the clarity of the stone.
Advantages of the emerald diamond
Extremely elegant appearance
Sophisticated design
Unique optical effect
Style inspired by celebrity jewelry
Who is it suitable for?
People who prefer discreet luxury and classic elegance.
Cushion Diamond – Romanticism and Vintage Charm
The cushion diamond is one of the most romantic shapes available.
The rounded corners and antique-inspired look make it a perfect choice for lovers of vintage style.
Cushion diamond advantages
Romantic look
Inspired by vintage jewelry
Excellent sparkle
Suitable for vintage and nature-inspired designs
Who is it for?
People who love classic elegance and romantic designs.
Which Diamond Shape Looks Bigger?
At the same carat, the perception of size is approximately:
Marquise
Oval
Emerald
Radiant
Cushion
If you want the most visual impact for your budget, oval and marquise are excellent choices.
Engagement Ring Trends in 2026
The most sought-after combinations are:
Oval diamond with hidden halo
Marquise solitaire diamond
Radiant diamond with pavé band
Emerald diamond with baguette sides
Vintage cushion diamond with milgrain details
Why Choose a Lab-Grown Diamond?
Lab-Grown diamonds are real diamonds, optically, chemically and physically identical to mined diamonds.
Their advantages include:
More affordable
Larger carats for the same budget
IGI certification
Excellent clarity and color
Modern and responsible choice
Conclusion
There is no “perfect” shape for everyone. The ideal choice depends on personal style and the desired visual effect:
Oval – elegant and very popular.
Marquise – dramatic and regal.
Radiant – maximum brilliance.
Emerald – understated luxury.
Cushion – romantic and vintage.
At Estera Jewellery, each model can be made with certified lab-cut diamonds, in 10K, 14K, 18K gold or platinum, with customizable sizes and carats to create the perfect engagement ring.