Oval or round diamond: which to choose

Sparkle

The round brilliant is the shape designed for the most light return, and it is the only shape that GIA gives an overall cut grade. That makes a round easier to choose on paper: an Excellent cut grade tells you the proportions are right. An oval is cut in the same brilliant style and is lively too, but it has no cut grade, so its photograph or video matters more.

Size on the hand

An oval is longer than a round of the same carat weight, so it covers more of the finger and tends to look larger. Its length also flatters the hand. A round looks the same from every direction, which many people find more classic.

The bow-tie

Most ovals show a darker band across the middle, shaped like a bow-tie. A faint one is normal; a heavy one dulls the centre of the diamond. It is not recorded on the grading report, so look at the diamond's own photograph or video before choosing.

Price

For the same carat weight, colour and clarity, a round usually costs more than an oval. Less of the rough crystal survives when a round is cut, and demand for rounds is the highest of any shape. Compare the two side by side in our live diamond list, where every price is current.

Settings

Both shapes suit a solitaire, a hidden halo and a three-stone ring. An oval sits well lengthways on a fine band; a round suits almost every setting made. Not sure where to begin? Find your ring in a minute, or read our guide to every shape.