What Is Diamond Shape?
Shape is the outline of the stone when viewed face-up, such as round, oval, or emerald. It is different from cut, which describes proportions, symmetry, and polish.
Shape affects how large a stone looks, how much sparkle it shows, and which settings suit it best.
Round and Oval
Round is the classic choice, with the most sparkle and the most even light return. Oval is elongated, which can make fingers look longer, and it often looks larger than a round stone of the same weight.
Oval stones can show a bow-tie shadow in the center. Compare several ovals and choose one where the shadow is faint.
Emerald and Asscher
Emerald is rectangular with step facets and a calm, architectural look, with less sparkle and more clarity of line. Asscher is square with step facets and a similar, more compact feel.
Step cuts show inclusions more easily than brilliant cuts, so clarity matters more for emerald and asscher stones.
Pear, Marquise, and Heart
Pear combines a round end with a pointed end, for a graceful, elongated look. Marquise is pointed at both ends and looks large for its weight. Heart is a romantic outline that needs careful symmetry to look balanced.
Pointed shapes need protective settings, because the points can chip if they are left exposed.
Cushion, Radiant, and Princess
Cushion is square or rectangular with rounded corners and a soft, romantic sparkle. Radiant is rectangular with brilliant facets and a bright, modern look. Princess is square with pointed corners and a crisp, contemporary feel.
Cushion and radiant stones come in many length-to-width ratios, so compare proportions, not only the shape name, before you decide.
How to Choose a Shape
Start with the outline you respond to, then check how it looks in the setting you want, how it sits next to a wedding band, and whether its proportions suit the wearer hand.
If you are unsure, round and oval are the safest choices for sparkle and for resale, while fancy shapes are the better choice when you want a distinctive look.
Diamond Shape Guide FAQ
What is the most popular diamond shape?
Round is the most popular, followed by oval and cushion. Popularity varies by year and by setting style.
Which shape looks largest?
Elongated shapes such as oval, marquise, and pear often look larger than round stones of the same weight.
Which shape sparkles most?
Round brilliant usually sparkles most, because its facet pattern is designed for maximum light return.
What is the difference between shape and cut?
Shape is the outline. Cut is how well that outline is proportioned, finished, and polished.
Which shapes need more care?
Pointed shapes such as pear, marquise, and heart need protective settings, because the points can chip.