Heart Shaped Diamond Buying Guide: The Ultimate Symbol of Romance

Understanding Heart Shaped Diamonds

Heart-shaped diamonds are a modified brilliant cut featuring 58 facets like round diamonds, but formed into the universal symbol of love. The shape consists of two rounded lobes at the top, a center cleft, and a pointed bottom. Creating a beautiful heart diamond requires exceptional cutting skill to achieve balanced symmetry and optimal light performance.

Heart shapes are among the rarest diamond shapes, accounting for less than 1% of all diamonds sold. This rarity, combined with the technical difficulty of cutting, means heart diamonds often command premium prices compared to more common shapes.

Ideal Length-to-Width Ratio

The length-to-width ratio determines how the heart shape appears—from wider and squatter to longer and narrower:

• Ideal Ratio: 1.00-1.05 - Classic heart appearance with balanced proportions; most popular and traditional look
• Acceptable Range: 0.95-1.10 - Still attractive but slightly wider (below 1.00) or slightly narrower (above 1.05)
• Avoid: Below 0.90 or Above 1.15 - Appears too wide/fat or too long/narrow; deviates significantly from classic heart proportions

A perfectly proportioned heart has a 1:1 ratio, creating equal visual balance between width and length. This creates the most recognizable and aesthetically pleasing heart shape.

Symmetry is Critical

More than any other shape, heart diamonds require perfect symmetry to appear beautiful. Symmetry affects multiple aspects:

Lobe Symmetry

The two rounded lobes at the top must be identical in size, shape, and curvature. Asymmetric lobes make the heart appear lopsided and unbalanced. View the diamond face-up and compare the left and right lobes directly.

Cleft Definition

The center cleft (the "V" between the lobes) should be clearly defined but not too deep. A shallow cleft makes the diamond appear more circular; an excessively deep cleft creates an awkward appearance. The ideal cleft depth is approximately 10-15% of the diamond's width.

Point Symmetry

The bottom point should align precisely with the center of the cleft. An off-center point makes the entire diamond appear skewed. This is immediately noticeable when the diamond is set.

Wing Symmetry

The "wings" (sides) extending from lobes to point should be perfectly mirrored. Asymmetric wings create an unbalanced appearance that's particularly visible in larger stones.

Optimal Depth and Table Percentages

Heart diamonds require specific proportions for optimal brilliance:

• Total Depth: 58-62% - Ensures proper light return without excessive depth that adds weight without beauty
• Table Percentage: 53-63% - Balances brilliance and fire; smaller tables (53-58%) create more fire, larger tables (58-63%) create more brilliance
• Polish and Symmetry: Excellent to Very Good - Critical for heart shapes due to complexity of the cut; poor symmetry is extremely visible

Heart diamonds with depth percentages above 65% or below 56% often exhibit light leakage or appear too flat. Always verify these proportions before purchase.

Bow Tie Effect in Heart Diamonds

Heart-shaped diamonds can exhibit a bow tie effect—a dark area across the center of the stone:

• Minimal Bow Tie: Nearly invisible or very faint in good lighting; acceptable and common in heart shapes
• Moderate Bow Tie: Visible but doesn't dominate appearance; may be acceptable depending on price and other qualities
• Severe Bow Tie: Creates significant dark area reducing brilliance; avoid these diamonds regardless of price

The bow tie effect results from light leakage through the pavilion. While nearly all heart diamonds show some bow tie, severity varies dramatically. Always view high-resolution photography or in-person inspection to evaluate bow tie severity before purchase.

Color Recommendations for Heart Shapes

Heart-shaped diamonds show color more than round diamonds due to their shape and light behavior:

• Platinum/White Gold Settings: Choose H color or higher to maintain colorless appearance; heart shapes show color in the pointed tip and lobes
• Yellow/Rose Gold Settings: I-J color acceptable; warm metal tone masks diamond's slight yellow tint
• Larger Sizes (2+ carats): Consider upgrading one color grade; color is more visible in larger heart diamonds

The pointed tip and curved lobes of heart diamonds concentrate color, making color grades slightly more important than in round diamonds.

Clarity Considerations

Heart-shaped diamonds are relatively forgiving in clarity compared to emerald or Asscher cuts:

• SI1-SI2 Range: Often eye-clean in heart shapes due to brilliant faceting that disperses light and masks inclusions
• Avoid Inclusions Near Cleft or Point: Inclusions in these high-stress areas create durability risks and are more visible
• VS2 or Higher: Recommended for larger stones (2+ carats) where inclusions become more visible

The brilliant facet pattern of heart diamonds helps hide inclusions better than step-cut shapes. Most SI1 heart diamonds will be eye-clean with careful selection.

Size and Carat Considerations

Heart-shaped diamonds require minimum sizes to be recognizable as hearts:

• Minimum Recommended: 0.50 carats - Below this size, the heart shape becomes difficult to distinguish from round or cushion
• Ideal Range: 0.75-2.00 carats - Shape is clearly recognizable; proportions are well-executed; price remains reasonable
• Large Hearts (2+ carats): Stunning but command significant premiums due to rarity of well-cut large heart diamonds

If budget requires a heart diamond under 0.75 carats, consider whether a different shape might offer better value and appearance. Heart shapes need adequate size to be recognizable.

Setting Considerations for Heart Diamonds

Proper setting is crucial for heart-shaped diamonds:

• Three-Prong Setting: Most common; two prongs secure the lobes, one protects the point; allows maximum light and visibility
• Bezel Setting: Offers maximum protection but can partially obscure the heart shape; only recommended for very active lifestyles
• Point Protection: Always ensure the pointed end has a prong or V-tip protection; the point is the most vulnerable area for chipping
• Orientation: Typically set with point down; some prefer point up for alternative look