The Cut Guide  ·  Reference Fancy Shape  ·  Brilliant Family
Cut Reference  ·  No. 008

Heart
Cut

Fancy Brilliant  ·  56–58 Facets

The most romantic of all cuts — and the most demanding. Symmetry tolerances that other shapes quietly forgive become unmistakable in a heart. Buy it for love, but buy it right.

The heart cut is a pear shape with a cleft cut into the top lobe — simple in concept, brutally unforgiving in execution. The two lobes must mirror each other exactly; the cleft must be precisely defined; the point at the bottom must be sharp without being fragile. Any deviation reads immediately because the human eye knows intuitively what a heart is supposed to look like. That familiarity is the cut's greatest vulnerability.

Origin

Heart-shaped stones appear as early as 1463, when Louis de Bruges presented one to Charles the Bold. Mary Queen of Scots famously sent Queen Elizabeth I a heart diamond ring in 1562 as a diplomatic overture. The modern heart brilliant evolved through the 20th century as cutters refined the pear's techniques and applied them symmetrically. Today it remains among the rarest of the major fancy shapes in terms of market share — most buyers who want it, want it specifically, and accept no substitutes.

On The Hand
Neutral
The heart's near-equal length and width make it neither elongating nor widening on the finger. The pointed culet demands a protective V-tip prong — without it, chipping is a genuine risk. In smaller sizes the silhouette reads as ambiguous; below 0.50 ct, most viewers won't register the shape at all.
56–58
Facets
1.00
Ideal L:W Ratio
0.70+
Min. Readable Size
−15%
vs. Round
Page 1 of 2
Expand
Heart Cut thecutguide.com
Specifications
Table Percentage
53 – 63%
Optimal range is 56–58%. Wider tables flatten the stone visually; narrower tables reduce face-up brilliance. This is less standardized than round — check the cert's actual proportion data.
Depth Percentage
58 – 62%
Stay within this range. Depths above 65% kill face-up size — the stone looks smaller than its carat weight suggests. Depths below 55% produce a washed-out, windowy stone.
Length-to-Width Ratio
0.90 – 1.10
Ideal is 1.00 — a perfectly square bounding box. Ratios outside this range skew the lobes and make asymmetry harder to avoid. Reject anything that looks lopsided on the cert diagram.
GIA Cut Grade
—
Fancy Shape
No GIA cut grade for hearts. Evaluate using table %, depth %, symmetry, and — critically — your own eyes. Request face-up photos under diffused lighting before buying sight-unseen.
Polish / Symmetry
Exc / Exc
Both Excellent — non-negotiable for a heart. Symmetry especially: a Very Good symmetry grade on a heart means you can likely see the imbalance. Don't compromise here.
Light Performance
Brilliance80
Fire78
Scintillation74
Size per Carat84
Clarity Concealment74

A well-cut heart performs similarly to a pear. Poorly cut examples develop a bowtie shadow across the center — a dark band visible face-up. Always evaluate with real photos, not cert data alone.

Budget
vs. Round Brilliant
−10 to −20%
Hearts trade at a discount to rounds. The range varies with market conditions — occasionally tighter, rarely reversed. The discount exists because demand is niche, not because the cut is inferior.
Lab-Grown Heart
−50 to −65%
Lab-grown hearts represent meaningful savings. The symmetry demands remain identical — a poorly cut lab stone is as bad as a poorly cut natural one. Same scrutiny applies.
What Retailers Won't Tell You
⚠ Asymmetry Is Extremely Common
Most hearts on the market have unequal lobes — one side larger, the cleft off-center. This is often invisible in listing photos shot from the right angle and distance. Demand face-up photos under natural or diffused light, not just the certificate diagram. If one lobe is noticeably larger than the other, walk away.
⚠ Size Below 0.70 ct Defeats the Purpose
Hearts require mass to communicate their shape. Under 0.70 carats, the silhouette reads as vague — viewers often mistake it for a round or pear. Most retailers will sell you a 0.50 ct heart without mentioning this. The shape's emotional impact is entirely dependent on it being legible. Size up or reconsider.
⚠ The Cleft Defines the Cut
A shallow cleft makes the stone look like a rounded pear, not a heart. A cleft that's too deep produces a pinched, bug-like silhouette. There is a narrow window of correctness and many stones miss it. No certification body grades cleft depth — you have to evaluate it visually from a true face-up image.
⚠ The Point Needs Protection
The bottom point is the most vulnerable part of any diamond — chips start at points. A heart set without a V-tip prong protecting the culet is an accident waiting to happen. Many settings, especially bezel variations, inadequately protect this area. Verify the setting before purchase, not after.
The Cut Guide  ·  Assessment  ·  Heart Cut
"The heart cut rewards the buyer who does their homework and punishes the one who doesn't. Asymmetry, a shallow cleft, and the bowtie effect are common in mediocre hearts — and the shape's instant recognizability means every flaw is on full display. When cut with genuine precision, there is nothing quite like it. Size up: under 0.70 carats, the silhouette starts to read as ambiguous rather than intentional. Insist on Excellent symmetry, a well-defined cleft, and real face-up photos before you commit."
Page 2 of 2
Expand