What to Look for When Buying a Marquise-Cut Diamond

A marquise-cut diamond is a striking choice for a solitaire ring and can make the finger look longer. Its pointed tips, distinctive outline and potential dark band through the centre make checking the actual stone’s appearance especially important.

What Is a Marquise Cut?

A marquise is an elongated diamond shape with pointed ends and a wider centre. Its brilliant-style facet arrangement can produce strong sparkle.

1. Length-to-Width Ratio

The ratio is calculated by dividing the stone’s length by its width. A lower ratio gives a fuller appearance; a higher ratio creates a slimmer, longer look. There is no single ideal. Two stones of the same carat weight can look very different on the finger because of their proportions.

• Fuller marquise: a broad face and a pronounced centre.
• Balanced length: a classic marquise silhouette.
• Very long marquise: a strong finger-lengthening effect and more delicate tips.

2. Check the Bow-Tie Effect

A dark, bow-tie-shaped band may be visible across the centre. A slight bow tie can be part of the stone’s character, while a broad, persistent dark area may reduce sparkle. Watch videos in different lighting rather than relying on a photograph.

3. Symmetry Is Critical

The two tips should share the same axis, the left and right sides should mirror each other, and the centre should not bulge to one side. Even a small difference in symmetry can make the stone look crooked in a ring.

4. Protect the Tips

Pointed tips are more exposed to impact. Choose V-shaped prongs or secure settings that surround the tips. Make sure the prongs do not put pressure only on the points and that both ends are protected equally.

5. Carat Weight and Millimetre Measurements

The elongated shape can make a marquise appear larger face-up than some other stones of the same carat weight. However, an overly deep stone may carry much of its weight underneath. Compare length, width and depth together.

6. Colour at the Tips

Colour may appear more concentrated at the ends of elongated cuts. If you want a more colourless appearance in a white-gold setting, carefully inspect a video of the actual stone. Yellow gold can complement a slightly warm tone.

7. Clarity

Brilliant facets can conceal some internal characteristics. However, characteristics reaching the pointed tips or lying close to the surface need separate consideration for durability. Check their position on the plotting diagram as well as the clarity grade.

8. Horizontal or Vertical?

The classic vertical orientation makes the finger look longer. A horizontal, or east-west, setting creates a more modern, wider appearance. Plan the setting’s orientation together with ring size and side stones.

Marquise-Cut Checklist

• Have you chosen the length-to-width ratio you prefer?
• Do both tips lie on the same axis?
• Are the left and right sides symmetrical?
• Is the bow-tie effect acceptable in the video?
• Are the millimetre measurements consistent with the carat weight?
• Are the tips protected by V-shaped prongs or a secure frame?
• Is colour concentrated at the tips?
• Do internal characteristics reach the pointed tips?

Explore the solitaire setting guide for setting options, or the diamond-cut comparison for other shapes.

Frequently Asked Questions

Does a marquise cut look large on the finger?

Its elongated face-up area can make it look larger than some more compact cuts of the same carat weight. Compare millimetre measurements for an accurate comparison.

Is a marquise cut suitable for everyday wear?

It can be worn with a setting that protects the tips well and with regular prong checks. Remove the ring during activities involving hard impacts.

What is the ideal marquise ratio?

There is no single ideal. A fuller or more elongated appearance is a matter of personal preference; symmetry and light performance are the key considerations.

Explore current designs on the lab-grown diamond rings page.