Round and oval diamond rings shown together in an archive collage.

Round vs Oval Diamonds: Choosing an Engagement Ring

February 23, 2021

Two Different Outlines

A round diamond has an even outline, while an oval extends along one direction. Both can suit a simple solitaire, a halo or a band with smaller stones. The best comparison starts with how the actual rings look on your hand, rather than a rule that one shape is automatically more flattering or more valuable.

Compare Measurements as Well as Carat Weight

Carat describes weight, not the width and length you see from above. An oval’s proportions can make its outline look longer, but there is no fixed percentage by which every oval looks larger than every round diamond. Ask to compare the actual measurements and view the stones beside each other in similar lighting.

Look at the Whole Diamond

Rotate each ring and notice where the light changes across the center and edges. Ovals can show a darker area through the middle, often called a bow tie; its visibility varies from stone to stone. Avoid choosing from a single bright photograph or treating one set of proportions as a guarantee of an attractive appearance.

Choose the Setting with the Stone

A halo changes the outline, and a raised basket affects how a wedding band will sit alongside the ring. Check the prongs, the space beneath the center and the comfort of the band. The photographs below include both plain and decorated settings so you can separate the effect of the diamond’s shape from the effect of its mounting.

Make the Final Comparison in Person

Bring your preferred metal color, budget and approximate ring size to the discussion. Compare grading reports for the actual stones and confirm the condition and sizing options of the exact ring. The archive illustrates design choices; it does not establish the current price or availability of any pictured piece.