A diamond's shape is the first thing anyone notices about an engagement ring — and the clearest expression of personal style. Round is the most classic and brilliant; oval looks larger and elongates the finger; emerald is elegant and understated. This guide covers ten common diamond shapes to help you choose by style, hand shape and budget.
Note: shape and cut are not the same — shape is the outline, while cut is the proportions and quality of the faceting. The same shape can be well or poorly cut.
Ten common diamond shapes
Round Brilliant
The most classic and popular cut. Its 57–58 facets maximise fire and brilliance. Timeless, and suits any style.
Oval
An elongated outline that looks larger and makes the finger appear slender. Near-round brilliance; hugely popular in recent years.
Princess
Square with sharp corners — modern, crisp and brilliant. One of the most popular choices after round.
Emerald
Rectangular step-cut facets create a clear, mirror-like "hall of mirrors" effect. Elegant, understated, and showcases clarity.
Cushion
Between square and round, with soft rounded corners for a romantic, vintage feel and gentle fire.
Pear
Rounded at one end, tapered at the other — blending round and marquise, distinctive and elongating.
Marquise
A pointed-end oval that maximises visual surface area and elongates the finger.
Radiant
Combines the emerald outline with brilliant-cut fire — square yet sparkling.
Heart
A romantic symbol, for wearers who want personality and emotional expression.
Asscher
A square step-cut with Art Deco character — vintage and refined.
Choosing a shape by hand type
- Slender fingers: compact shapes like round, princess or heart.
- To elongate: long cuts like oval, pear or marquise.
- For understated elegance: step-cuts like emerald or asscher.
Shape and budget
Round loses the most rough during cutting and typically shows the most fire; some elongated cuts (oval, pear) look larger for the same carat. When choosing a lab grown diamond, compare shapes among our IGI-certified lab grown diamonds to find the best fit for your budget.
Roselle Jewelry offers lab grown diamonds in round, oval, princess, cushion, emerald, pear and more, with full custom design. Visit our Tsim Sha Tsui and Causeway Bay boutiques to compare in person.
Frequently asked questions
Which diamond shape sparkles the most?
The Round Brilliant. Its 57–58 optically optimised facets give it the highest fire and brilliance of all shapes.
Which shape makes a diamond look bigger?
Elongated cuts such as oval, pear and marquise look larger for the same carat and also elongate the finger.
Are shape and cut the same thing?
No. Shape is the diamond's outline; cut is the proportions, symmetry and polish quality. The same shape can still be well or poorly cut.
Do lab grown diamonds come in every shape?
Yes. Roselle Jewelry's IGI-certified lab grown diamonds come in round, oval, princess, cushion, emerald, pear and more.
