Diamond shapes for engagement rings: six options to compare

Choose a diamond shape by comparing its outline, proportions and appearance in the setting you want. This guide covers six options for an engagement ring, whether you are considering a lab-grown or natural diamond.

Shape and cut quality describe different things

Shape describes the outline. Cut also concerns how a diamond has been fashioned, including facet arrangement, proportions and finish. A shape name alone does not guarantee sparkle, visible size or price.

Six engagement-ring shapes to compare

Round brilliant: a circular outline

A round brilliant combines a circular outline with brilliant-style faceting. Compare its proportions, finish and light performance in the actual stone rather than assuming every round diamond looks the same.

Oval: length and proportion

An oval offers an elongated outline. Compare length-to-width proportions and any visible dark bow-tie pattern in different lighting. Two ovals of the same weight can look noticeably different.

Princess: a square outline with corners

A princess cut offers a square outline and pointed corners. Ask how the setting protects those corners, and compare the diamond’s appearance and the ring’s height.

Cushion: rounded corners

A cushion combines rounded corners with a square or rectangular outline. Facet patterns vary, so compare actual examples if you prefer a particular style of sparkle.

Emerald: step-cut facets

An emerald cut has a rectangular outline, cut corners and step-cut facets. Compare the pattern of reflections, proportions and any visible inclusions in the actual stone.

Marquise: an elongated pointed outline

A marquise has an elongated outline with two pointed ends. Check its symmetry and proportions, and ask how the setting protects the tips and feels on the hand.

Compare the diamond on the hand

Check actual millimetre dimensions alongside carat weight. Compare band width, setting height and how the ring sits with a wedding band. Try more than one outline before choosing; an elongated shape is a preference, rather than a rule about what suits a particular hand.

Confirm the stone and setting details

Ask which independent report applies to the selected diamond or finished jewellery. Compare complete quotations including the stone, additional diamonds, metal, making charges and taxes.

Explore Glora’s engagement rings or discuss a custom setting. Confirm design feasibility, size, timing and applicable aftercare before approving the order.