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Education›Lab Grown Diamond Guidance›Heart Cut Diamond — The Complete Guide

Lab Grown Diamond GuidanceFenora Guide8 min read

Heart cut diamond — the complete guide.

The heart cut diamond is the most directly romantic of all diamond shapes — a brilliant-cut diamond in the outline of a heart. Unmistakably a love symbol, the heart cut is chosen for its personal meaning as much as its optical character. This guide covers everything about the heart cut.

What makes the heart cut distinctive

The heart cut diamond is a pear-shaped stone modified to create a cleft at the top — the characteristic two lobes of a heart outline. The result is a brilliant-cut diamond in the shape of the universal symbol of love. No other diamond shape makes its communicative intent as explicit as the heart cut.

The heart cut requires more cutting expertise than most shapes — the cleft at the top must be precisely formed, the two lobes must be symmetrical and the point at the bottom must be sharp and centred. A poorly executed heart cut looks irregular and asymmetrical. A well-executed heart cut is one of the most beautiful and distinctive diamonds available.

Key heart cut characteristics

Brilliant cut faceting — good light performance
Most communicatively personal of all shapes — a love symbol as a diamond
Symmetry is critical — the two lobes must be equal and the point must be centred
Cleft definition — the V-notch at the top must be clearly defined for the heart shape to read correctly
Ideal L:W ratio: 0.95–1.05 (nearly equal height and width)
V-prong at the pointed tip for protection

“The heart cut is for buyers who are fully committed to expressing love directly and boldly. There is nothing subtle about a heart diamond — and for the buyers who choose it, that is exactly the point.”
— Yash Chandpara, Founder

What makes a Well-Cut heart — what to look for

The critical quality factors in heart cut

Symmetry of the two lobes — the most important visual quality factor. Both lobes should be identical in size and curve. Even a slight asymmetry is immediately visible and significantly affects the appearance
Cleft definition — the V-notch at the top must be clearly and sharply defined. A shallow or undefined cleft makes the heart outline ambiguous
Centred point — the pointed tip at the bottom should be exactly centred. An off-centre point disrupts the symmetry of the entire shape
Balanced proportions — neither too wide nor too narrow. L:W ratio of 0.95–1.05 produces the most recognisable and balanced heart shape

Settings for heart cut

Heart cut setting options

5-prong setting — two prongs per lobe (4) plus one V-prong at the pointed tip. The most classic heart cut setting. The prongs follow the outline of the heart and protect the tip
Bezel setting — a continuous metal rim following the heart outline. Maximum protection. The bezel creates a clean metal frame around the heart shape
3-prong minimal — one prong per lobe and one V-prong at the tip. Very delicate and minimal — suits buyers who want the heart shape with the least metal visible

The V-prong at the tip

Like pear and marquise, the heart cut has a pointed tip that concentrates stress and requires specific protection
A V-prong cups the tip and protects it while keeping it visible. Essential in any prong-set heart cut

Heart diamond questions

What is the best size for a heart cut diamond to read clearly?

Heart cuts read most clearly at 0.5ct and above. Very small heart cuts (below 0.3ct) are too small for the heart outline to be clearly visible without magnification. At 0.5ct+ the shape is immediately recognisable as a heart.

Is heart cut suitable as an engagement ring stone?

Yes — for buyers who want to make an unambiguous statement of love. The heart cut is not the most subtle choice, which is why some buyers love it and others prefer something less directly symbolic.

Does the heart cut have a bow tie effect?

Heart cuts can have a bow tie effect across the central width, similar to pear and marquise. Symmetry assessment and bow tie assessment should both be done in video before purchase.

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Choosing a heart cut diamond? Ask Yash Chandpara.

Book a free online consultation. Yash Chandpara shows heart cut diamonds in video — symmetry and cleft definition are the key quality factors to assess on screen.

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