Diamond shape guide

Oval Diamond Guide

Elegant, elongated and full of brilliance.

What makes a good oval diamond?

The biggest visual variable is often the bow tie: a dark band across the center caused by the way the stone returns and blocks light. Some contrast is normal; a heavy, persistent bow tie can dominate the stone.

Proportions and face-up size

Length-to-width ratio describes the outline, not quality. Many buyers prefer roughly 1.35–1.50, but preference varies and visual balance matters more than hitting a formula.

Carat is weight. For ovals, publish length and width in mm and compare spread at the same carat—elongated stones can look larger than rounds while deep ovals hide weight you never see face-up.

Color and clarity

Brilliant faceting can mask inclusions reasonably well, but elongated ovals may show color differently toward the ends. Inspect the actual video in both face-up and slightly tilted angles.

Warmth often reads first at the tips. In platinum or white gold, many buyers land in G–I after comparing neighbors; yellow gold hides tint further. Prefer eye-clean centers—bow-tie shadow can make a central inclusion look worse than its grade suggests.

What to inspect in 360° video

• Bow-tie severity: light contrast is normal; a heavy permanent bar is not.
• Shoulder symmetry and whether one side looks flatter than the other.
• End-to-end brightness—avoid stones that go dark for long stretches while turning.
• Color pooling at the tips versus the center.
• Any dark inclusion sitting inside the bow-tie zone.

Best buying strategy

1. Pick a length-to-width band you like (often ~1.35–1.50) and stick to it while shortlisting.
2. Set millimeter length/width targets so carat does not hide a deep cut.
3. Screen out heavy bow-ties in video before optimizing color or clarity letters.
4. Choose color/clarity from the actual oval, not from round-brilliant rules of thumb.
5. Compare three ovals with matched ratios and similar mm side-by-side.

Educational reference: GIA diamond-quality and shape guidance. Fancy-shape appearance varies materially from stone to stone, so ratios and measurements are screening tools rather than guarantees.